Air conditioning system and vehicle

Abstract

The application discloses an air conditioning system and a vehicle, and relates to the technical field of air conditioning systems, and specifically discloses an air conditioning system comprising a compressor, a first condenser, a second condenser, a liquid storage device, an evaporator, a battery pack, a heat exchanger, a gas-liquid separation device and the like. The outlet of the compressor is selectively communicated with the first condenser, the second condenser and the battery pack; the liquid storage device has a shell, a liquid inlet pipe and a liquid outlet pipe, a liquid storage space is formed in the shell, the liquid inlet pipe is selectively communicated with the liquid storage space or the liquid outlet pipe, and the liquid outlet pipe is also selectively communicated with the liquid storage space or the liquid inlet pipe. The liquid inlet pipe is selectively communicated with the first condenser and the second condenser, and the liquid outlet pipe is selectively communicated with the evaporator, the battery pack and the heat exchanger; and a bypass flow path is connected in parallel with the evaporator. Thus, the air conditioning system has the functions of storing and releasing refrigerant, can quickly reach the optimization of refrigerant circulation flow, reduces the high-pressure internal resistance of the air conditioning system, improves the circulation efficiency of the refrigerant, and thus improves the operation efficiency of the air conditioning system and reduces the power consumption of the air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more specifically, to an air conditioning system and a vehicle having the air conditioning system. Background Technology

[0002] In related technologies, existing air conditioning systems suffer from a mismatch in refrigerant circulation volume, high internal resistance, and low refrigerant circulation efficiency during operation, resulting in low operating efficiency and high power consumption. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, the present invention proposes an air conditioning system that helps reduce the power consumption of the air conditioning system.

[0004] The present invention also proposes a vehicle having the above-mentioned air conditioning system.

[0005] The air conditioning system according to the present invention includes:

[0006] The compressor, first condenser, second condenser, liquid storage device, evaporator, battery pack, heat exchanger, gas-liquid separator and bypass flow path are connected in series. The compressor, first condenser, liquid storage device, evaporator and gas-liquid separator are connected in parallel. The second condenser is connected in parallel with the first condenser. The bypass flow path is connected in parallel with the evaporator and is equipped with a first on / off valve.

[0007] The liquid storage device is used to dry and filter refrigerant. The liquid storage device has a shell, an inlet pipe and an outlet pipe. A liquid storage space is formed inside the shell. The inlet pipe is selectively connected to the liquid storage space or the outlet pipe. The outlet pipe is also selectively connected to the liquid storage space. The outlet pipe is connected to a bypass flow path.

[0008] The heat exchanger has a first heat exchanger inlet and a first heat exchanger outlet connected together. The first heat exchanger inlet is adapted to be selectively connected to the battery pack and also selectively connected to the liquid outlet pipe. The first heat exchanger outlet is connected to the bypass flow path and also selectively connected to the evaporator inlet.

[0009] The compressor outlet is selectively connected to the battery pack, the gas-liquid separator inlet is selectively connected to the battery pack, and the liquid outlet pipe is selectively connected to the battery pack.

[0010] The condenser inlets of the first and second condensers are selectively connected to the compressor outlet. The liquid inlet pipe is connected to the condenser outlets of both the first and second condensers. The liquid outlet pipe is selectively connected to the evaporator inlet of the evaporator.

[0011] The air conditioning system according to the present invention has the function of storing and releasing refrigerant, which can quickly achieve the optimization of the refrigerant circulation flow in the system, thereby reducing the high-pressure internal resistance of the air conditioning system, improving the circulation efficiency of the refrigerant, thereby improving the operating efficiency of the air conditioning system and reducing the power consumption of the air conditioning system.

[0012] In some examples of the present invention, the air conditioning system further includes: a three-way valve having a first interface, a second interface and a third interface, the first interface being connected to a liquid outlet pipe, the second interface being connected to a bypass flow path, and the second interface also being selectively connected to an evaporator inlet, the second interface being adapted to selectively connect to a battery pack, and the third interface being selectively connected to a first heat exchanger inlet.

[0013] In some examples of the present invention, the air conditioning system has a first operating mode. In the first operating mode, the compressor is delayed and shut down. The inlet pipe is connected to the liquid storage space, the outlet pipe is connected to the liquid storage space, the inlet of the gas-liquid separator is connected to the battery pack, the compressor draws out the refrigerant from the battery pack and the evaporator and allows the refrigerant to flow into the compressor through the compressor inlet. The refrigerant compressed by the compressor flows from the compressor outlet into the first condenser for heat dissipation and liquefaction. The refrigerant flowing out from the first condenser flows into the liquid storage space for storage. When the compressor stops, the inlet pipe and the outlet pipe are switched to a connected state to complete the refrigerant storage after the air conditioning system stops.

[0014] In some examples of the present invention, the air conditioning system has a second operating mode in which the inlet pipe is connected to the liquid storage space, the outlet pipe is connected to the liquid storage space, the condenser inlet of the second condenser is connected to the compressor outlet, the condenser outlet of the second condenser is connected to the inlet pipe, and the outlet pipe is connected to the inlet of the first heat exchanger.

[0015] The refrigerant flowing from the compressor flows into the second condenser to exchange heat with the air in the passenger compartment. The refrigerant flowing from the second condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange. The refrigerant flowing out of the heat exchanger flows into the gas-liquid separator and the compressor through the bypass path to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state, so that the refrigerant flowing into the liquid storage device flows directly into the heat exchanger through the liquid outlet pipe for heat exchange.

[0016] In some examples of the present invention, the air conditioning system has a third operating mode. In the third operating mode, the inlet pipe and the outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the battery pack and the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the inlet pipe, the outlet pipe is connected to the inlet of the first heat exchanger, the inlet of the first heat exchanger is connected to the bypass flow path, and the inlet of the first heat exchanger is connected to the battery pack.

[0017] Part of the refrigerant flowing out of the compressor flows into the first condenser for heat dissipation and liquefaction, while another part of the refrigerant flowing out of the compressor flows into the battery pack to heat the battery pack. The refrigerant flowing out of the first condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange, and the refrigerant flowing out of the battery pack flows into the heat exchanger for heat exchange. The refrigerant flowing out of the heat exchanger flows into the gas-liquid separator and the compressor in sequence through the bypass flow path to participate in the next cycle. After the refrigerant has circulated multiple times, the connection between the compressor outlet and the condenser inlet of the first condenser is cut off, and the connection between the liquid outlet pipe and the inlet of the first heat exchanger is also cut off.

[0018] In some examples of the present invention, the air conditioning system has a fourth operating mode. In the fourth operating mode, the inlet pipe and the outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the battery pack and the condenser inlet of the second condenser, the condenser outlet of the second condenser is connected to the inlet pipe, and the inlet of the first heat exchanger is connected to the bypass flow path, the battery pack, and the outlet pipe.

[0019] Part of the refrigerant flowing out of the compressor flows into the second condenser to exchange heat with the air in the passenger compartment, while another part of the refrigerant flowing out of the compressor flows into the battery pack to heat the battery pack. The refrigerant flowing out of the second condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange, and the refrigerant flowing out of the battery pack flows into the heat exchanger for heat exchange. The refrigerant flowing out of the heat exchanger flows into the gas-liquid separator and the compressor through the bypass path to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state.

[0020] In some examples of the present invention, the air conditioning system has a fifth operating mode. In the fifth operating mode, the inlet pipe and the outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the inlet pipe, the outlet pipe is connected to the evaporator inlet, and the gas-liquid separation device inlet is connected to the battery pack.

[0021] The compressor draws refrigerant from the battery pack and allows it to flow into the compressor through the compressor inlet. Refrigerant flowing out of the evaporator flows back into the compressor through a gas-liquid separator. The compressed refrigerant flows from the compressor outlet into the first condenser for heat dissipation and liquefaction. Refrigerant flowing out of the first condenser flows into the liquid storage space for storage. A portion of the refrigerant in the liquid storage space flows into the evaporator through the liquid outlet pipe to exchange heat with the air in the passenger compartment. When the pressure within the air conditioning system stabilizes, the inlet and outlet pipes are switched to a connected state, allowing the refrigerant flowing into the liquid storage device to directly flow into the evaporator through the liquid outlet pipe for heat exchange. In some examples of this invention, the air conditioning system has a sixth operating mode. In this sixth operating mode, both the inlet and outlet pipes are connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the inlet pipe, the outlet pipe is connected to the battery pack, the inlet of the gas-liquid separator is connected to the battery pack, and the first on / off valve is closed.

[0022] The compressor draws refrigerant from the evaporator and allows it to flow into the compressor through the compressor inlet. Refrigerant flowing out of the battery pack flows into the compressor through a gas-liquid separator. The refrigerant compressed by the compressor flows from the compressor outlet into the first condenser for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser flows into the liquid storage space for storage. A portion of the refrigerant in the liquid storage space flows into the battery pack through the liquid outlet pipe and exchanges heat with the battery pack. When the pressure in the air conditioning system is stable, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state so that the refrigerant flowing into the liquid storage device can directly flow into the battery pack through the liquid outlet pipe for heat exchange.

[0023] In some examples of the present invention, the air conditioning system has a seventh operating mode. In the seventh operating mode, the inlet pipe and the outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the inlet pipe, the outlet pipe is connected to the battery pack and the evaporator, the gas-liquid separation device inlet is connected to the battery pack, and the first on / off valve is closed.

[0024] The refrigerant flowing from the compressor flows into the first condenser for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the battery pack and evaporator through the liquid outlet pipe. The refrigerant flowing out of the battery pack and the refrigerant flowing out of the evaporator both flow into the gas-liquid separator. The refrigerant flowing out of the gas-liquid separator flows into the compressor to participate in the next cycle. After the refrigerant has circulated multiple times, the inlet pipe and the outlet pipe are switched to a connected state so that the refrigerant flowing into the liquid storage device can directly flow into the battery pack and evaporator through the outlet pipe.

[0025] In some examples of the present invention, the air conditioning system further includes: a first control flow path and a second control flow path, the first control flow path being adapted to be connected between the inlet of the gas-liquid separator and the battery pack, and the first control flow path being provided with a first on / off valve group, the second control flow path being adapted to be connected between the liquid outlet pipe and the battery pack, and the second control flow path being provided with a second on / off valve group.

[0026] In some examples of the invention, the compressor outlet is selectively connected to the gas-liquid separator inlet or the battery pack via a first on / off valve assembly.

[0027] In some examples of the present invention, the air conditioning system further includes: a second on / off valve, the first on / off valve group having a third on / off valve and a first throttle valve connected in series, the valve inlet of the second on / off valve being connected to the compressor outlet, and the valve outlet of the second on / off valve being connected to both the valve inlet of the third on / off valve and the valve outlet of the first throttle valve.

[0028] In some examples of the present invention, the air conditioning system further includes a fourth on / off valve connected between the first heat exchanger inlet and the second control flow path, the fourth on / off valve being used to control the on / off of the first heat exchanger inlet and the battery pack.

[0029] In some examples of the present invention, the second on / off valve group has a fifth on / off valve and a first expansion valve connected in series, and the connection point of the fourth on / off valve to the second control flow path is located between the fifth on / off valve and the first expansion valve.

[0030] In some examples of the present invention, the air conditioning system further includes a second expansion valve connected between the third interface and the first heat exchanger inlet, such that the third interface is selectively connected to the first heat exchanger inlet.

[0031] In some examples of the present invention, the air conditioning system further includes: a third expansion valve, the valve inlet of the third expansion valve being connected to the second interface, the first heat exchanger outlet, and the second control flow path, and the valve outlet of the third expansion valve being connected to the evaporator inlet.

[0032] In some examples of the present invention, the air conditioning system further includes a heat exchange flow path, wherein the heat exchanger further has a second heat exchanger inlet and a second heat exchanger outlet in communication, and the heat exchange flow path is connected between the second heat exchanger inlet and the second heat exchanger outlet.

[0033] According to the present invention, the vehicle includes the air conditioning system described above.

[0034] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an air conditioning system according to an embodiment of the present invention.

[0036] Figure label:

[0037] Air conditioning system 100;

[0038] Compressor 1; Compressor outlet 1a; Compressor inlet 1b;

[0039] First condenser 21; Second condenser 22;

[0040] Liquid storage device 3; housing 30; liquid storage space 31; inlet pipe 32; outlet pipe 33; filter assembly 34;

[0041] First space 311; Second space 312;

[0042] Evaporator 4; Evaporator inlet 4a; Evaporator outlet 4b;

[0043] Gas-liquid separation device 5; Gas-liquid separation device inlet 5a;

[0044] Bypass flow path 6; First control flow path 71; Second control flow path 72;

[0045] Heat exchanger 8; First heat exchanger inlet 8a; First heat exchanger outlet 8b;

[0046] Three-way valve 9; First port 9a; Second port 9b; Third port 9c;

[0047] Battery pack 10; heat exchange flow path 11; powertrain 111; heater 12;

[0048] First shut-off valve 2a; Second shut-off valve 2b; Third shut-off valve 2c; Fourth shut-off valve 2d; Fifth shut-off valve 2e; Sixth shut-off valve 2f; Seventh shut-off valve 2g;

[0049] First throttle valve 3a; First expansion valve 3b; Second expansion valve 3c; Third expansion valve 3d;

[0050] First check valve 6a; second check valve 6b. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0052] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] The following is combined Figure 1 The air conditioning system 100 according to an embodiment of the present invention is described in detail. The air conditioning system 100 can be applied to a vehicle, but the present invention is not limited thereto. The air conditioning system 100 can be applied to other equipment that requires the installation of the air conditioning system 100. The present invention is described with the air conditioning system 100 applied to a vehicle as an example.

[0056] like Figure 1 As shown, the air conditioning system 100 according to an embodiment of the present invention includes: a compressor 1, a first condenser 21, a second condenser 22, a liquid storage device 3, an evaporator 4, a battery pack 10, a heat exchanger 8, a gas-liquid separator 5, and a bypass flow path 6. The compressor 1, the first condenser 21, the liquid storage device 3, the evaporator 4, and the gas-liquid separator 5 are connected in series. The second condenser 22 is connected in parallel with the first condenser 21. The bypass flow path 6 is connected in parallel with the evaporator 4 and is provided with a first on / off valve 2a.

[0057] The liquid storage device 3 is used to dry and filter the refrigerant. The liquid storage device 3 has a housing 30, an inlet pipe 32 and an outlet pipe 33. A liquid storage space 31 is formed inside the housing 30. The inlet pipe 32 is selectively connected to the liquid storage space 31 or the outlet pipe 33, and the outlet pipe 33 is also selectively connected to the liquid storage space 31. The outlet pipe 33 is connected to the bypass flow path 6.

[0058] The heat exchanger 8 has a first heat exchanger inlet 8a and a first heat exchanger outlet 8b connected together. The first heat exchanger inlet 8a is adapted to be selectively connected to the battery pack 10 and also selectively connected to the liquid outlet pipe 33. The first heat exchanger outlet 8b is connected to the bypass flow path 6 and also selectively connected to the evaporator inlet 4a.

[0059] The compressor outlet 1a of compressor 1 is selectively connected to battery pack 10, the gas-liquid separator inlet 5a of gas-liquid separator 5 is selectively connected to battery pack 10, and the liquid outlet pipe 33 is selectively connected to battery pack 10.

[0060] The condenser inlet of the first condenser 21 and the condenser inlet of the second condenser 22 are selectively connected to the compressor outlet 1a. The liquid inlet pipe 32 is connected to the condenser outlet of the first condenser 21 and the condenser outlet of the second condenser 22. The liquid outlet pipe 33 is selectively connected to the evaporator inlet 4a of the evaporator 4.

[0061] In some embodiments of the present invention, such as Figure 1 As shown, the evaporator 4 is used for heat exchange in the passenger compartment of the vehicle. That is, during the process of the refrigerant flowing through the evaporator 4, the refrigerant is suitable for heat exchange with the air in the passenger compartment, so as to realize the effect of the evaporator 4 for heat exchange in the passenger compartment, which in turn helps to realize the effect of the air conditioning system 100 having a passenger compartment cooling mode.

[0062] Specifically, when the air conditioning system 100 is in cooling mode, the refrigerant is compressed by the compressor 1 and discharged as a high-temperature, high-pressure gaseous refrigerant from the compressor outlet 1a. This high-temperature, high-pressure gaseous refrigerant then flows to the first condenser 21, which can be configured as an external condenser. Because the refrigerant temperature is higher than the ambient air intake temperature, the first condenser 21 dissipates heat to the outside air, causing the high-temperature, high-pressure gaseous refrigerant to exchange heat and form a medium-temperature, high-pressure liquid refrigerant, which then flows out of the first condenser 21. Furthermore, since the condenser outlet of the first condenser 21 is connected to the liquid inlet pipe 32 of the liquid storage device 3, the refrigerant discharged from the first condenser 21 flows into the liquid storage device 3 through the liquid inlet pipe 32. The refrigerant flows out of the liquid storage device 3 through the liquid outlet pipe 33 and then flows to the evaporator 4. In the evaporator 4, the refrigerant evaporates, absorbing heat from the air in the passenger compartment and becoming a low-temperature, low-pressure gaseous refrigerant.

[0063] This enables the air conditioning system 100 to have a passenger compartment cooling mode. The low-pressure, low-temperature gaseous refrigerant flowing out of the evaporator outlet 4a then flows into the gas-liquid separator 5. The gas-liquid separator 5 is used to separate the gaseous and liquid refrigerant in the refrigerant, preventing the liquid refrigerant from flowing into the compressor 1 and causing liquid slugging in the compressor 1, thereby improving the working stability of the compressor 1 and thus improving the working stability of the air conditioning system 100.

[0064] It should be noted that since the low-temperature and low-pressure gaseous refrigerant may contain a small amount of liquid refrigerant, a gas-liquid separator 5 needs to be connected to one end of the compressor inlet 1b of the compressor 1 to prevent the refrigerant from causing liquid slugging in the compressor 1.

[0065] In some embodiments of the present invention, such as Figure 1 As shown, the second condenser 22 is used for heat exchange in the passenger compartment of the vehicle. That is, during the process of the refrigerant flowing through the second condenser 22, the refrigerant is suitable for heat exchange with the air in the passenger compartment, so as to realize the effect of the second condenser 22 for heat exchange in the passenger compartment, which in turn helps to realize the effect of the air conditioning system 100 having a passenger compartment heating mode.

[0066] Specifically, when the air conditioning system 100 is in heating mode, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 flows to the second condenser 22. After passing through the second condenser 22, the cold air is heated into hot air and sent into the passenger compartment. After heat exchange, the refrigerant in the second condenser 22 forms a medium-temperature and high-pressure liquid refrigerant and flows out of the second condenser 22.

[0067] Furthermore, since the condenser outlet of the second condenser 22 is connected to the liquid inlet pipe 32 of the liquid storage device 3, the refrigerant discharged from the second condenser 22 flows into the liquid storage device 3 through the liquid inlet pipe 32, thereby achieving the effect that the refrigerant discharged from the compressor 1 can flow into the liquid storage device 3.

[0068] The refrigerant flows out of the liquid storage device 3 through the liquid outlet pipe 33, and then flows into the heat exchanger 8 through the inlet 8a of the first heat exchanger. Inside the heat exchanger 8, the refrigerant evaporates and absorbs the heat generated by the power assembly, becoming a low-temperature, low-pressure gaseous refrigerant. The low-pressure, low-temperature gaseous refrigerant flowing out of the heat exchanger outlet 8b flows into the gas-liquid separator 5 through the bypass path 1. The gas-liquid separator 5 is used to separate the gaseous and liquid refrigerant in the refrigerant, preventing the liquid refrigerant from flowing into the compressor 1 and causing liquid slugging in the compressor 1, thereby improving the working stability of the compressor 1 and achieving the effect of improving the working stability of the air conditioning system 100.

[0069] In some embodiments of the present invention, such as Figure 1As shown, the battery pack 10 can provide electrical energy to the vehicle, enabling the vehicle to be configured as an electric vehicle. The battery pack 10 is located in the air conditioning system 100. The first heat exchanger inlet 8a is selectively connected to the heat exchange system of the battery pack 10, the compressor outlet 1a is selectively connected to the heat exchange system of the battery pack 10, the gas-liquid separator inlet 5a is selectively connected to the heat exchange system of the battery pack 10, and the liquid outlet pipe 33 is selectively connected to the heat exchange system of the battery pack 10. By allowing refrigerant to flow through the heat exchange system of the battery pack 10, heat exchange between the refrigerant and the battery pack 10 is achieved, thus enabling the air conditioning system 100 to have both battery cooling and battery heating modes.

[0070] In some embodiments, when the air conditioning system 100 is in cooling mode, the air conditioning system 100 can be in battery cooling mode. Specifically, after the refrigerant is compressed by the compressor 1, it is discharged as a high-temperature and high-pressure gaseous refrigerant from the compressor outlet 1a. Then, the high-temperature and high-pressure gaseous refrigerant flows to the first condenser 21. The refrigerant exchanges heat through the first condenser 21 to form a medium-temperature and high-pressure liquid refrigerant, which then flows out of the first condenser 21. The refrigerant then flows into the liquid storage device 3 and flows out of the liquid storage device 3 through the liquid outlet pipe 33. Then, it flows to the battery pack 10. During the process of the refrigerant flowing through the battery pack 10, it can absorb the heat of the battery pack 10, thereby reducing the temperature of the battery pack 10 and enabling the air conditioning system 100 to be in battery cooling mode.

[0071] In some embodiments, when the air conditioning system 100 is in heating mode, it can be in battery heating mode. Specifically, after the refrigerant is compressed by the compressor 1, it is discharged as a high-temperature and high-pressure gaseous refrigerant from the compressor outlet 1a. Then, the high-temperature and high-pressure gaseous refrigerant flows to the battery pack 10. During the process, the refrigerant can release heat to the battery pack 10, thereby raising the temperature of the battery pack 10. This enables the air conditioning system 100 to be in battery cooling mode. After flowing through the battery pack 10, the refrigerant flows to the heat exchanger 8, then to the bypass path 6, and then to the gas-liquid separator 5. After flowing through the gas-liquid separator 5, the refrigerant flows back to the compressor 1, achieving the effect of refrigerant circulation.

[0072] In some embodiments of the present invention, such as Figure 1As shown, when the air conditioning system 100 is in cooling mode, it can provide a battery-powered cooling mode for the passenger compartment, thereby reducing the air temperature inside the passenger compartment and the temperature of the battery pack 10. Specifically, after the refrigerant is compressed by the compressor 1, it flows to the first condenser 21, and then to the liquid storage device 3. After the refrigerant is discharged from the liquid storage device 3, it can flow to the evaporator 4 and the battery pack 10 respectively, achieving the effect of heat exchange through the evaporator 4 and the battery pack 10. This enables the air conditioning system 100 to have a battery-powered cooling mode for the passenger compartment. After flowing through the evaporator 4 and the battery pack 10, the refrigerant flows to the gas-liquid separator 5, and after flowing through the gas-liquid separator 5, it flows back to the compressor 1, achieving the effect of refrigerant circulation.

[0073] In some embodiments of the present invention, such as Figure 1 As shown, when the air conditioning system 100 is in heating mode, it can provide a battery-assisted heating mode for the passenger compartment, which raises both the air temperature inside the passenger compartment and the temperature of the battery pack 10. Specifically, after the refrigerant is compressed by the compressor 1, it flows to the second condenser 22 and the battery pack 10, achieving heat exchange through both the second condenser 22 and the battery pack 10. This enables the air conditioning system 100 to function as a battery-assisted heating mode for the passenger compartment. After passing through the second condenser 22 and the battery pack 10, the refrigerant flows to the heat exchanger 8. After heat exchange in the heat exchanger 8, the refrigerant flows to the bypass path 6, and then through the bypass path 6 to the gas-liquid separator 5. After passing through the gas-liquid separator 5, the refrigerant flows back to the compressor 1, achieving a refrigerant circulation effect.

[0074] In some embodiments of the present invention, such as Figure 1 As shown, during the refrigerant flow through the liquid storage device 3, it is selectively connected to the liquid storage space 31 or the liquid outlet pipe 33 via the liquid inlet pipe 32, thereby achieving the effect of selectively storing the refrigerant in the liquid storage space 31. In the prior art, when the air conditioning system is in cooling mode, there is often an excess of refrigerant in various components and pipes of the air conditioning system. This excess refrigerant can lead to higher pressure in the air conditioning system, resulting in reduced refrigerant circulation efficiency and lower cooling efficiency during flow, ultimately increasing the energy consumption of the air conditioning system.

[0075] According to an embodiment of the present invention, the air conditioning system 100 is provided with a liquid storage device 3. The liquid storage device 3 can be used to store excess refrigerant in various components and pipes of the air conditioning system 100. It can also be understood that when there is too much refrigerant in various components and pipes of the air conditioning system 100, the excess refrigerant is stored in the liquid storage space 31 of the liquid storage device 3, thereby avoiding the situation where there is too much refrigerant in various components and pipes of the air conditioning system 100.

[0076] Specifically, when there is excessive refrigerant in the air conditioning system 100, the refrigerant in the various components and pipes of the air conditioning system 100 flows into the liquid storage space 31. At this time, the liquid storage device 3 is in a state where the inlet pipe 32 is connected to the liquid storage space 31, so that the refrigerant is stored in the liquid storage space 31, realizing the effect of storing refrigerant in the liquid storage device 3. Thus, the air conditioning system 100 according to the embodiment of the present invention can effectively prevent the high pressure of the air conditioning system 100, improve the circulation efficiency of the refrigerant in the air conditioning system 100, which is conducive to improving the cooling effect of the air conditioning system 100 and reducing the energy consumption of the air conditioning system 100. Furthermore, since the energy consumption of the air conditioning system 100 is reduced, the energy consumption of the vehicle using the air conditioning system 100 of the embodiment of the present invention is reduced, which is conducive to increasing the driving range of the vehicle.

[0077] In the existing technology, when the air conditioning system is in heating mode, after the air conditioning system is turned off, the refrigerant can migrate under the pressure difference of the air conditioning system, so that the refrigerant is distributed in various components and pipes of the air conditioning system. When the air conditioning system restarts the heating mode, the heating rate of the air conditioning system is low due to the low refrigerant circulation efficiency, resulting in poor heating effect of the existing air conditioning system.

[0078] According to the air conditioning system 100 of the present invention, when the heating demand command of the air conditioning system 100 stops, the compressor 1 is controlled to delay shutting down. That is, after the heating demand command of the air conditioning system 100 stops, the compressor 1 continues to work for a period of time. Under the action of the compressor 1, at least part of the refrigerant distributed in the various components and pipelines of the air conditioning system 100 is discharged from the compressor outlet 1a. After passing through the first condenser 21, the refrigerant flows into the liquid storage device 3. At this time, the state of the liquid storage device 3 is that the liquid inlet pipe 32 is connected to the liquid storage space 31 so that the refrigerant is stored in the liquid storage space 31, thereby realizing the effect of the liquid storage device 3 for storing refrigerant. When the heating mode is restarted, the compressor 1 operates, allowing refrigerant to be discharged from the first condenser 21 and flow into the liquid storage space 31. Since the temperature of the refrigerant discharged from the first condenser 21 is higher than that of the refrigerant originally stored in the liquid storage space 31, the refrigerant discharged from the first condenser 21 can heat the refrigerant originally stored in the liquid storage space 31 during the flow of refrigerant into the liquid storage space 31. The refrigerant evaporates due to the heat, thereby increasing the pressure in the liquid storage space 31. Under the action of pressure, the speed at which the refrigerant stored in the liquid storage space 31 flows back to the various components and pipes of the air conditioning system 100 is increased, thereby increasing the refrigerant density in the various components and pipes of the air conditioning system 100, thus improving the refrigerant circulation efficiency and the heating effect of the air conditioning system 100.

[0079] In some embodiments of the present invention, such as Figure 1 As shown, the liquid storage device 3 can be used to dry and filter the refrigerant. Specifically, when the inlet pipe 32 is connected to the liquid storage space 31, the refrigerant is suitable for flowing into the liquid storage space 31, thereby achieving the effect of drying and filtering the refrigerant using the liquid storage device 3. When the inlet pipe 32 is not connected to the liquid storage space 31 and the inlet pipe 32 is connected to the outlet pipe 33, the refrigerant cannot flow into the liquid storage space 31. That is, the refrigerant flowing into the liquid storage device 3 from the inlet pipe 32 is directly discharged from the liquid storage device 3 through the outlet pipe 33. The liquid storage device 3 is constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. However, the liquid storage device 3 does not perform drying or filtering treatment on the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the refrigerant flow process, and thus improves the operating efficiency of the air conditioning system 100. It also helps to reduce the discharge pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0080] It should be noted that during the drying and filtration process of the refrigerant by the liquid storage device 3, a certain flow resistance is generated on the flow of the refrigerant, thereby reducing the flow speed of the refrigerant. Therefore, according to the embodiment of the present invention, the liquid storage device 3 can selectively control the drying and filtration of the refrigerant flowing into the liquid storage device 3.

[0081] For example, when the air conditioning system 100 is first started, the refrigerant flowing into the liquid storage device 3 is dried and filtered, thereby eliminating moisture and impurities in the refrigerant, achieving the effect of purifying the refrigerant and eliminating moisture in the refrigerant, which helps to improve the cleanliness of the air conditioning system 100 and reduce the risk of pollution and damage to the air conditioning system 100 caused by impurities, moisture and other factors.

[0082] After the air conditioning system 100 has been running for a period of time, that is, after the refrigerant has been dried and filtered by the liquid storage device 3 for a period of time, the refrigerant in the air conditioning system 100 is in a stable state. In order to avoid affecting the flow rate of the refrigerant, the inlet pipe 32 is not connected to the liquid storage space 31, and the inlet pipe 32 is connected to the outlet pipe 33, so that the refrigerant cannot flow into the liquid storage space 31. That is, the liquid storage device 3 does not dry and filter the refrigerant. This helps to avoid the flow resistance generated by the refrigerant in the process of flowing through the liquid storage device 3, reduce the resistance loss in the refrigerant flow process, and thus improve the operating efficiency of the air conditioning system 100.

[0083] In summary, according to the air conditioning system 100 of the present invention, the air conditioning system 100 has a cooling mode and a heating mode, wherein the cooling mode may include a passenger compartment cooling mode, and the heating mode may include a passenger compartment heating mode. When the air conditioning system 100 is in cooling mode or heating mode, the refrigerant can be stored in the liquid storage space 31 to prevent excessively high pressure in the air conditioning system 100 during cooling mode operation, thereby improving the circulation efficiency of the refrigerant in the air conditioning system 100, increasing the system cooling rate, and thus improving the cooling effect of the air conditioning system 100 and reducing its energy consumption. During heating mode operation, the pressure in the liquid storage space 31 is increased, thereby increasing the speed at which the refrigerant stored in the liquid storage space 31 flows back to the various components and pipes of the air conditioning system 100 under pressure, increasing the refrigerant density in the various components and pipes of the air conditioning system 100, and thus improving the circulation efficiency of the refrigerant and the heating effect of the air conditioning system 100.

[0084] Furthermore, according to the liquid storage device 3 of the present invention, the liquid storage device 3 can selectively dry and filter the refrigerant, thereby achieving the effect of drying and filtering the refrigerant according to the specific situation of the air conditioning system 100. This helps to avoid the flow resistance generated by the refrigerant during the flow of the liquid storage device 3, reduce the resistance loss during the flow of the refrigerant, and thus improve the operating efficiency of the air conditioning system 100.

[0085] In some embodiments of the present invention, such as Figure 1As shown, the liquid storage device 3 may also have a filter assembly 34, which is disposed in the liquid storage space 31 to divide the liquid storage space 31 into a first space 311 and a second space 312. The inlet pipe 32 is adapted to communicate with the first space 311, and the outlet pipe 33 is adapted to communicate with the second space 312.

[0086] The filter assembly 34 is used to filter and dry the refrigerant flowing into the second space 312, thereby purifying the refrigerant and eliminating moisture in the refrigerant. This helps to improve the cleanliness of the air conditioning system 100 and reduce the risk of pollution and damage to the air conditioning system 100 caused by impurities, moisture and other factors.

[0087] Refrigerant flows into the first space 311 through the liquid inlet pipe 32. During the flow of liquid refrigerant from the first space 311 into the second space 312, the liquid refrigerant passes through the filter assembly 34, where it undergoes filtration and drying. This allows the filter assembly 34 to filter and dry the liquid refrigerant flowing into the second space 312. After filtration and drying by the filter assembly 34, the liquid refrigerant can be stored in the second space 312, thus enabling the liquid storage and drying module to perform the functions of filtering, drying, and storing liquid refrigerant.

[0088] Furthermore, the liquid refrigerant stored in the second space 312 flows back to the air conditioning system 100 through the liquid outlet pipe 33, thereby regulating the refrigerant flow in the air conditioning system 100, which in turn helps to maintain the pressure in the air conditioning system 100 and improve the working stability of the air conditioning system 100.

[0089] In some embodiments of the present invention, the filter assembly 34 may include a filter plate and a molecular sieve, which are stacked together. The filter plate is positioned above the molecular sieve. The refrigerant first passes through the filter plate for filtration. The filter plate is used to filter impurities in the refrigerant. After filtration, the refrigerant flows through the molecular sieve, which is used to absorb moisture in the refrigerant, thereby achieving the effect of drying the refrigerant. Thus, the filter assembly 34 is used to filter and dry the liquid refrigerant flowing into the second space 312.

[0090] It should be noted that molecular sieves are artificially synthesized desiccants that have the function of screening molecules. Their crystal structure contains cations, and their water absorption effect is stronger than the intermolecular forces. Even when the refrigerant has a low water content and a high temperature, they still have a high water absorption capacity, and their water absorption capacity is not affected by the refrigeration oil.

[0091] In some embodiments of the present invention, the liquid storage device 3 further includes a control component disposed in the first space 311 and connected between the inlet pipe 32 and the outlet pipe 33. The control component is configured to selectively communicate the inlet pipe 32 with the liquid storage space 31 or the outlet pipe 33, and the control component is also configured to selectively communicate the outlet pipe 33 with the second space 312, so as to achieve the effect of selectively storing the refrigerant in the liquid storage device 3.

[0092] When the control component controls the inlet pipe 32 to be connected to the first space 311 and the inlet pipe 32 to be disconnected from the outlet pipe 33, the refrigerant flows from the inlet pipe 32 into the first space 311 and from the first space 311 into the second space 312. During the flow of the refrigerant from the first space 311 to the second space 312, it passes through the filter component 34, thereby achieving the effect of filtering and drying the refrigerant. The refrigerant flowing into the second space 312 is stored in the second space 312, thus realizing the effect of the liquid storage device 3 for storing refrigerant.

[0093] When the control component controls the inlet pipe 32 to be connected to the first space 311 and not connected to the outlet pipe 33, and the outlet pipe 33 to be connected to the second space 312, the refrigerant flows from the first space 311 into the second space 312. The filter component 34 filters and dries the refrigerant. Since the outlet pipe 33 is connected to the second space 312, the refrigerant flowing into the second space 312 can be discharged from the liquid storage device 3 through the outlet pipe 33. This achieves the effect of the liquid storage device 3 filtering and drying the refrigerant in the air conditioning system 100, thereby purifying the refrigerant and eliminating moisture in the refrigerant. This helps to improve the cleanliness of the air conditioning system 100 and reduce the risk of pollution and damage to the air conditioning system 100 caused by impurities, moisture, and other factors.

[0094] When the control component controls the inlet pipe 32 to be disconnected from the first space 311, the inlet pipe 32 to be connected to the outlet pipe 33, and the outlet pipe 33 to be disconnected from the second space 312, that is, when the inlet pipe 32 and the outlet pipe 33 are constructed to form a conductive conduit, the refrigerant flows from the inlet pipe 32 into the storage space 31 and then directly exits the storage device 3 through the outlet pipe 33, so that the refrigerant flowing through the storage space 31 does not pass through the filter component 34 for filtration and drying, thereby eliminating the resistance of the filter component 34 to the refrigerant flow, reducing the resistance loss in the refrigerant flow process, thereby improving the operating efficiency of the air conditioning system 100, and also helping to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1, which is beneficial to increasing the vehicle's range and improving the operating efficiency of the air conditioning system 100.

[0095] In some embodiments of the present invention, such as Figure 1As shown, when the air conditioning system 100 starts running, the control component operates, the liquid inlet pipe 32 is connected to the first space 311, the liquid inlet pipe 32 is not connected to the liquid outlet pipe 33, and the liquid outlet pipe 33 is connected to the second space 312, so that the refrigerant flows into the first space 311 and flows into the second space 312 through the filter component 34. During the process of the refrigerant flowing from the first space 311 to the second space 312, the filter component 34 filters and dries the refrigerant. Under the action of pressure difference, the refrigerant in the second space 312 flows back into the air conditioning system 100, so that the liquid storage device 3 can be used to filter and dry the refrigerant in the air conditioning system 100.

[0096] After the air conditioning system 100 has been running for a certain period of time, its working state becomes stable. By controlling the operation of the control component, the liquid inlet pipe 32 is not connected to the first space 311, the liquid inlet pipe 32 is connected to the liquid outlet pipe 33, and the liquid outlet pipe 33 is not connected to the second space 312. This prevents the refrigerant from flowing into the first space 311. The refrigerant then flows into the control component and is discharged from the liquid storage device 3 through the liquid outlet pipe 33, achieving the effect of refrigerant returning to the air conditioning system 100. This avoids the refrigerant needing to flow through the filter component 34 during its flow through the liquid storage device 3, thereby eliminating the resistance of the filter component 34 to the refrigerant flow, reducing the resistance loss during the refrigerant flow process, which is beneficial to reducing the discharge pressure of the compressor 1, achieving the effect of reducing the power consumption of the compressor 1, which is beneficial to increasing the vehicle's driving range, and also beneficial to improving the operating efficiency of the air conditioning system 100.

[0097] In some embodiments of the present invention, the control component includes: a first control valve body and a second control valve body. The first control valve body has a first interface end, a second interface end and a third interface end that are selectively connected. The first interface end is connected to the liquid inlet pipe 32 to realize the effect of refrigerant flowing into the first control valve body from the liquid inlet pipe 32. The second interface end is connected to the first space 311 to realize the effect of refrigerant flowing into the first space 311 from the first control valve body, thereby realizing the effect of liquid inlet pipe 32 being connected to the first space 311 so that refrigerant can flow into the second space 312.

[0098] The second control valve body has a selectively connected fourth, fifth, and sixth interface end. The fourth interface end is connected to the third interface end, enabling communication between the first and second control valve bodies, allowing liquid refrigerant to flow from the first control valve body into the second control valve body. The fifth interface end is connected to the liquid outlet pipe 33, enabling communication between the second control valve body and the liquid outlet pipe 33, allowing refrigerant within the second control valve body to be discharged from the liquid storage device 3. The sixth interface end is connected to the second space 312, enabling communication between the second control valve body and the second space 312, allowing refrigerant stored in the second space 312 to flow into the second control valve body. Furthermore, when the fifth interface end is connected to the liquid outlet pipe 33, the refrigerant within the second space 312 is discharged from the liquid storage device 3.

[0099] Thus, according to the control component of the present invention, the liquid inlet pipe 32 is selectively connected to the first space 311 or the liquid outlet pipe 33, and the liquid outlet pipe 33 is selectively connected to the second space 312, thereby enabling the liquid storage device 3 to be configured to selectively dry and filter the refrigerant.

[0100] In some embodiments of the present invention, such as Figure 1 As shown, the control component includes a first rotating body and a second rotating body. Both the first rotating body and the second rotating body can be constructed as a fan-shaped structure. The first rotating body is located in the first control valve body, and the second rotating body is located in the second control valve body. By controlling the rotation of the first rotating body and the second rotating body, the selective connection between the first interface end, the second interface end and the third interface end can be achieved, as well as the selective connection between the fourth interface end, the fifth interface end and the sixth interface end can be achieved.

[0101] For example, in the first control valve body, when the first interface end is connected to the second interface end, the first rotating body rotates to the third interface end, blocking the third interface end, thereby preventing the first control valve body from connecting with the second control valve body, so that the refrigerant flowing into the first control valve body can flow into the first space 311. In the second control valve body, when the fifth interface end and the sixth interface end are connected, the second rotating body rotates to the fourth interface end, blocking the fourth interface end, thereby preventing the second control valve body from connecting with the first control valve body, so that the refrigerant in the second space 312 can flow into the second control valve body and be discharged from the liquid storage device 3 through the second control valve body.

[0102] Furthermore, when the third and fourth interface ends are connected, in the first control valve body, the first rotating body rotates to the second interface end, blocking the second interface end, thereby preventing the refrigerant in the first control valve body from flowing into the first space 311, so that the refrigerant in the first control valve body flows into the second control valve through the third interface end. In the second control valve body, the fourth and fifth interfaces are connected, so that the refrigerant in the second control valve body is discharged from the liquid storage device 3, achieving the effect of refrigerant return to the air conditioning system 100.

[0103] Furthermore, it should be noted that in the second control valve body, the fifth interface end can also be connected to the sixth interface end, thereby realizing the effect of replenishing the refrigerant stored in the second space 312 to various components and pipelines in the air conditioning system 100, ensuring that the air conditioning system 100 has sufficient refrigerant, reducing the risk of insufficient pressure in the air conditioning system 100, and improving the working stability of the air conditioning system 100.

[0104] When the fifth interface end is connected to the sixth interface end, the second rotating body blocks the sixth interface end to ensure that the fifth interface end and the sixth interface end are connected. When the fifth interface end and the sixth interface end are not connected, the second rotating body rotates to the sixth interface end so that the second rotating body blocks the sixth interface end, thereby achieving the effect of the fifth interface end and the sixth interface end not being connected, and preventing the refrigerant stored in the second space 312 from flowing into the second control valve body.

[0105] Therefore, according to the control component of this embodiment of the invention, by controlling the rotation angle of the first and second rotating bodies, the inlet pipe 32 can be selectively connected to the first space 311 or the outlet pipe 33, and the outlet pipe 33 can be selectively connected to the second space 312. This allows the control component to control the flow direction of the refrigerant. By controlling the rotation angle of the first and second rotating bodies, the flow rate of the refrigerant can be controlled, which helps maintain the high and low pressures of the air conditioning system 100. By controlling the time when the first rotating body opens the first interface 9a and the second interface 9b, the time for the refrigerant to flow into the second space 312 can be controlled, thereby controlling the amount of refrigerant stored in the second space 312.

[0106] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include: a first control flow path 71 and a second control flow path 72. The first control flow path 71 is adapted to be connected between the gas-liquid separator inlet 5a and the battery pack 10, and the first control flow path 71 is provided with a first on / off valve group. The second control flow path 72 is adapted to be connected between the liquid outlet pipe 33 and the battery pack 10, and the second control flow path 72 is provided with a second on / off valve group.

[0107] like Figure 1 As shown, the battery pack 10 is connected in series between the first control flow path 71 and the second control flow path 72 to achieve cooling and heating of the battery pack 10. The heat exchange system of the battery pack 10 is connected between the liquid outlet pipe 33 and the inlet 5a of the gas-liquid separator so that the refrigerant can flow through the heat exchange system of the battery pack 10. The refrigerant is suitable for heat exchange with the battery pack 10, thereby enabling the air conditioning system 100 to control the temperature of the battery pack 10.

[0108] For example, when the air conditioning system 100 is in cooling mode, the refrigerant can absorb heat from the battery pack 10, thereby helping to prevent the battery pack 10 from overheating and reducing the risk of battery pack 10 failure. When the air conditioning system 100 is in heating mode, the battery pack 10 can absorb heat from the refrigerant, thereby helping to prevent the battery pack 10 from overheating and thus helping the battery pack 10 achieve its optimal operating efficiency. Therefore, according to the air conditioning system 100 of the present invention, the temperature of the battery pack 10 can be maintained at a suitable operating temperature, ensuring the operational stability of the battery pack 10, and thus enabling vehicles using the air conditioning system 100 of the present invention to extend their driving range.

[0109] The first control flow path 71 is equipped with a first on / off valve assembly, which can be used to control the on / off connection between the gas-liquid separator inlet 5a and the battery pack 10, so that the refrigerant can selectively flow between the gas-liquid separator inlet 5a and the battery pack 10. This allows refrigerant to flow from the first control flow path 71 into the battery pack 10, or vice versa. The second control flow path 72 is equipped with a second on / off valve assembly, which can be used to control the on / off connection between the liquid outlet pipe 33 and the battery pack 10, so that the refrigerant can selectively flow between the liquid outlet pipe 33 and the battery pack 10. This allows the refrigerant discharged from the liquid outlet pipe 33 to flow into the battery pack 10 through the second control flow path 72, enabling the air conditioning system 100 to meet the operating requirements of different modes, thereby facilitating the realization of multiple operating modes in the air conditioning system 100.

[0110] In some embodiments of the present invention, such as Figure 1 As shown, the compressor outlet 1a is selectively connected to the gas-liquid separator inlet 5a or the battery pack 10 through the first on / off valve group. It can also be understood that the compressor outlet 1a is connected to the gas-liquid separator inlet 5a and the battery pack 10. Through the first on / off valve group, the compressor outlet 1a is connected to the gas-liquid separator inlet 5a or the compressor outlet 1a is connected to the battery pack 10, so that the air conditioning system 100 can meet the working requirements of different modes, thereby helping to achieve the effect of the air conditioning system 100 having multiple working modes.

[0111] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a second on / off valve 2b. By opening and closing the second on / off valve 2b, the refrigerant can selectively flow through the second on / off valve 2b. Specifically, when the second on / off valve 2b is open, the refrigerant can flow through the second on / off valve 2b, and when the second on / off valve 2b is closed, the refrigerant cannot flow through the second on / off valve 2b.

[0112] The first on / off valve group has a third on / off valve 2c and a first throttle valve 3a connected in series. By opening and closing the third on / off valve 2c, the refrigerant can selectively flow through the third on / off valve 2c. The first throttle valve 3a can regulate the flow rate of the refrigerant through the battery pack 10. By controlling the opening degree of the first throttle valve 3a, the flow rate of the refrigerant through the first throttle valve 3a can be controlled.

[0113] The inlet of the second on-off valve 2b is connected to the outlet 1a of the compressor, enabling the compressor 1 to communicate with the second on-off valve 2b. The outlet of the second on-off valve 2b is connected to the first throttle valve 3a, enabling the second on-off valve 2b to communicate with the first throttle valve 3a. This enables the compressor 1 to be connected to the first control flow path 71 and allows the compressor 1 to selectively communicate with the first throttle valve 3a, so that the refrigerant discharged from the compressor 1 selectively passes through the second on-off valve 2b and flows to the first throttle valve 3a. When the second on-off valve 2b is open, the refrigerant discharged from the compressor 1 can flow to the second on-off valve 2b, and then to the first throttle valve 3a. After passing through the first throttle valve 3a, it can flow to the battery pack 10. Thus, by controlling the first throttle valve 3a, the flow rate of the refrigerant flowing through the battery pack 10 can be adjusted.

[0114] like Figure 1 As shown, the connection point between the compressor 1 and the first control flow path 71 is located between the third on / off valve 2c and the first throttle valve 3a. By controlling the on / off of the second on / off valve 2b, the refrigerant discharged from the compressor outlet 1a can flow into the first control flow path 71.

[0115] Furthermore, by controlling the opening and closing of the third on / off valve 2c, the refrigerant can selectively flow through the third on / off valve 2c, thereby controlling and regulating the flow rate of the refrigerant through the first throttle valve 3a. This is beneficial for regulating the pressure in the air conditioning system 100 and for maintaining the operational stability of the air conditioning system 100.

[0116] In some embodiments, when the second on / off valve 2b is open, the third on / off valve 2c is closed and the first throttle valve 3a is open, so that the refrigerant discharged from the compressor outlet 1a flows sequentially through the second on / off valve 2b and the first throttle valve 3a to the battery pack 10, thereby realizing the battery heating mode and the passenger compartment plus battery heating mode.

[0117] In some embodiments, when the second shut-off valve 2b is closed, the third shut-off valve 2c is opened, and the first throttle valve 3a is opened, so that the refrigerant discharged from the battery pack 10 flows through the first throttle valve 3a and the third shut-off valve 2c, and then flows to the gas-liquid separation device 5, thereby facilitating the realization of the passenger cabin plus battery cooling mode.

[0118] Therefore, by providing a second on / off valve 2b, a third on / off valve 2c, and a first throttle valve 3a in the air conditioning system 100, the air conditioning system 100 can meet the working requirements of different modes, thereby helping to achieve the effect of the air conditioning system 100 having multiple working modes.

[0119] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a heat exchanger 8, which has a first heat exchanger inlet 8a and a first heat exchanger outlet 8b connected in communication. The refrigerant is adapted to flow into the heat exchanger 8 from the first heat exchanger inlet 8a and be discharged from the heat exchanger 8 from the first heat exchanger outlet 8b, so as to achieve the effect of refrigerant flowing through the heat exchanger 8.

[0120] The first heat exchanger inlet 8a is selectively connected to the battery pack 10 to achieve the effect of selective connection between the first heat exchanger 8 and the battery pack 10. The first heat exchanger inlet 8a is also selectively connected to the liquid outlet pipe 33 to achieve the effect of selective connection between the first heat exchanger 8 and the liquid storage space 31. The first heat exchanger outlet 8b is connected to the bypass flow path 6 to achieve the effect of connection between the first heat exchanger 8 and the bypass flow path 6. The first heat exchanger outlet 8b is also selectively connected to the evaporator inlet 4a to achieve the effect of selective connection between the first heat exchanger 8 and the evaporator outlet 4b. This allows the air conditioning system 100 to meet the working requirements of different modes, thereby facilitating the realization of the air conditioning system 100 having multiple working modes.

[0121] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a fourth shut-off valve 2d. By opening and closing the fourth shut-off valve 2d, the refrigerant can selectively flow through the fourth shut-off valve 2d. Specifically, when the fourth shut-off valve 2d is open, the refrigerant can flow through the fourth shut-off valve 2d, and when the fourth shut-off valve 2d is closed, the refrigerant cannot flow through the fourth shut-off valve 2d.

[0122] The fourth on-off valve 2d is connected between the first heat exchanger inlet 8a and the second control flow path 72. The fourth on-off valve 2d is used to control the on-off of the first heat exchanger inlet 8a and the battery pack 10, so as to achieve the effect of selectively connecting the battery pack 10 with the first heat exchanger 8. That is, when the fourth on-off valve 2d is open, the battery pack 10 can be connected to the first heat exchanger 8, so that the refrigerant can flow between the battery pack 10 and the first heat exchanger 8. When the fourth on-off valve 2d is closed, the battery pack 10 is disconnected from the first heat exchanger 8, so that the refrigerant cannot flow between the battery pack 10 and the first heat exchanger 8. This allows the air conditioning system 100 to meet the working requirements of different modes, thereby helping to achieve the effect of the air conditioning system 100 having multiple working modes.

[0123] In some embodiments of the present invention, such as Figure 1As shown, the second on / off valve assembly has a fifth on / off valve 2e and a first expansion valve 3b connected in series. By opening and closing the fifth on / off valve 2e, the refrigerant can selectively flow through it. Specifically, when the fifth on / off valve 2e is open, the refrigerant can flow through it; when it is closed, the refrigerant cannot flow through it. The first expansion valve 3b can be configured as an electronic expansion valve. An electronic expansion valve has a throttling and pressure-reducing function, so that the temperature of the refrigerant flowing through it can be effectively reduced after passing through the first expansion valve 3b, which is beneficial for the air conditioning system 100 to have both cooling and heating modes.

[0124] The connection point between the fourth on / off valve 2d and the second control flow path 72 is located between the fifth on / off valve 2e and the first expansion valve 3b, as follows: Figure 1 As shown, in some embodiments of the present invention, when the first expansion valve 3b is connected to the fourth on-off valve 2d and the fifth on-off valve 2e is closed, the refrigerant cannot pass through the fifth on-off valve 2e in the second control flow path 72. This allows the refrigerant discharged from the battery pack 10 to flow to the fourth on-off valve 2d after passing through the first expansion valve 3b, and then to the heat exchanger 8 after passing through the fourth on-off valve 2d. Consequently, the refrigerant can flow through the heat exchanger 8 to the bypass flow path 6 or the evaporator outlet 4b, so that the air conditioning system 100 can meet the working requirements of different modes, thereby facilitating the realization of the air conditioning system 100 having multiple working modes.

[0125] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a three-way valve 9, which has a first port 9a, a second port 9b, and a third port 9c. The first port 9a is selectively connected to either the second port 9b or the third port 9c. Alternatively, it can be understood that when the first port 9a is connected to the second port 9b, the first port 9a is not connected to the third port 9c, so that refrigerant can flow into the three-way valve 9 from the first port 9a and exit the three-way valve 9 from either the second port 9b or the third port 9c.

[0126] The first port 9a is connected to the outlet pipe 33, enabling the three-way valve 9 to connect with the outlet pipe 33 so that the refrigerant discharged from the outlet pipe 33 can flow into the three-way valve 9. The second port 9b is connected to the bypass flow path 6. In some embodiments, the second port 9b is connected to the bypass flow path 6, thereby enabling the three-way valve 9 to connect with the bypass flow path 6 so that the refrigerant discharged from the second port 9b can flow to the bypass flow path 6.

[0127] In some embodiments, the second port 9b can also be connected to the evaporator inlet 4a, thereby enabling the three-way valve 9 to be connected to the evaporator 4, so that the refrigerant discharged from the second port 9b can flow to the evaporator 4. In addition, when the second port 9b is not connected to the evaporator inlet 4a, the three-way valve 9 is not connected to the evaporator 4, so that the refrigerant in the three-way valve 9 cannot flow to the evaporator 4, so that the air conditioning system 100 can meet the working requirements of different modes, thereby helping to achieve the effect of the air conditioning system 100 having multiple working modes.

[0128] In some embodiments, the second interface 9b is also adapted to selectively communicate with the battery pack 10. When the second interface 9b is communicated with the battery pack 10, the three-way valve 9 can be connected to the battery pack 10 so that the refrigerant in the three-way valve 9 can flow into the battery pack 10. When the second interface 9b is not communicated with the battery pack 10, the three-way valve 9 is not connected to the battery pack 10 so that the refrigerant in the three-way valve 9 cannot flow into the battery pack 10. This allows the air conditioning system 100 to meet the working requirements of different modes, thereby facilitating the realization of the air conditioning system 100 having multiple working modes.

[0129] In some embodiments, the third interface 9c is selectively connected to the first heat exchanger inlet 8a. When the third interface 9c is connected to the first heat exchanger inlet 8a, the three-way valve 9 can be connected to the first heat exchanger 8 so that the refrigerant in the three-way valve 9 can flow into the first heat exchanger 8. When the third interface 9c is not connected to the first heat exchanger inlet 8a, the three-way valve 9 is not connected to the first heat exchanger 8 so that the refrigerant in the three-way valve 9 cannot flow into the first heat exchanger 8. This allows the air conditioning system 100 to meet the working requirements of different modes, thereby facilitating the realization of the air conditioning system 100 having multiple working modes.

[0130] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a second expansion valve 3c, which may be configured as an electronic expansion valve. The electronic expansion valve has a throttling and pressure reduction function so that the temperature of the refrigerant flowing through the second expansion valve 3c can be effectively reduced, which is beneficial for the air conditioning system 100 to have both cooling and heating modes.

[0131] The second expansion valve 3c is connected between the third port 9c and the first heat exchanger inlet 8a, so that the third port 9c can selectively communicate with the first heat exchanger inlet 8a. When the second expansion valve 3c is open, the refrigerant can pass through the second expansion valve 3c to achieve the effect of conduction between the third port 9c and the first heat exchanger inlet 8a, so that the refrigerant can flow from the three-way valve 9 into the heat exchanger 8, and the refrigerant flows into the heat exchanger 8 after passing through the second expansion valve 3c, so as to achieve the effect of delivering the lower temperature refrigerant to the heat exchanger 8.

[0132] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a third expansion valve 3d, which may be configured as an electronic expansion valve. The electronic expansion valve has a throttling and pressure reduction function so that the temperature of the refrigerant flowing through the third expansion valve 3d can be effectively reduced, which is beneficial for the air conditioning system 100 to have both cooling and heating modes.

[0133] The valve inlet of the third expansion valve 3d is connected to the second port 9b, the first heat exchanger outlet 8b, and the second control flow path 72, so that the refrigerant discharged from the three-way valve 9 from the second port 9b can flow to the third expansion valve 3d, the refrigerant discharged from the heat exchanger 8 from the first heat exchanger outlet 8b can flow to the third expansion valve 3d, and the refrigerant discharged from the second control flow path 72 can flow to the third expansion valve 3d.

[0134] The outlet of the third expansion valve 3d is connected to the evaporator inlet 4a so that the refrigerant discharged from the outlet of the third expansion valve 3d can flow into the evaporator outlet 4b. Thus, when the third expansion valve 3d is open, the evaporator outlet 4b can be connected to the second interface 9b, the evaporator outlet 4b can be connected to the first heat exchanger outlet 8b, and the evaporator outlet 4b can be connected to the second control flow path 72. The refrigerant flows into the evaporator outlet 4b after passing through the third expansion valve 3d, so as to achieve the effect of delivering the lower temperature refrigerant to the evaporator outlet 4b. Since the evaporator outlet 4b is used for heat exchange in the passenger compartment of the vehicle, it is beneficial to realize the effect of the air conditioning system 100 having a passenger compartment cooling mode.

[0135] In some embodiments of the present invention, such as Figure 1As shown, the air conditioning system 100 may further include a heat exchange flow path 11, and the heat exchanger 8 may further have a second heat exchanger inlet and a second heat exchanger outlet connected together, with the heat exchange flow path 11 connecting the second heat exchanger inlet and the second heat exchanger outlet. Specifically, the heat exchange flow path 11 may have a powertrain 111, which is used to drive the vehicle. For example, the powertrain 111 may be a vehicle motor to achieve the effect of driving the vehicle. In some embodiments, the heat exchanger 8 has a first heat exchange path and a second heat exchange path, which are not connected. The two ends of the first heat exchange path are the first heat exchanger inlet 8a and the first heat exchanger outlet 8b, respectively, and the two ends of the second heat exchange path are the second heat exchanger inlet and the second heat exchanger outlet, respectively. Since the heat exchange flow path 11 is connected between the second heat exchanger inlet and the second heat exchanger outlet, the heat exchange medium in the heat exchange flow path 11 can flow into the second heat exchange path of the heat exchanger 8, thereby exchanging heat between the heat exchange medium in the second heat exchange path and the refrigerant in the first heat exchange path, thereby achieving the effect of heat exchange between the refrigerant and the heat exchange flow path 11, so that the refrigerant can absorb the heat of the heat exchange flow path 11, reduce the temperature of the power assembly 11, and maintain the temperature of the power assembly 11 at a suitable operating temperature, so that the power assembly 11 can be in a higher operating efficiency range.

[0136] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include: a first one-way valve 6a, which is connected between the condenser outlet of the first condenser 21 and the liquid inlet pipe 32. The first one-way valve 6a is configured to flow from the first condenser 21 to the liquid inlet pipe 32. That is, the refrigerant can flow from the first condenser 21 to the liquid inlet pipe 32 through the first one-way valve 6a, but the refrigerant cannot flow from the liquid inlet pipe 32 to the first condenser 21 through the first one-way valve 6a, thereby preventing the refrigerant in the liquid inlet pipe 32 from flowing to the first condenser 21, which is beneficial to improving the working stability of the air conditioning system 100.

[0137] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a second one-way valve 6b, which is connected between the condenser outlet of the second condenser 22 and the liquid inlet pipe 32. The second one-way valve 6b is configured to allow refrigerant to flow from the second condenser 22 to the liquid inlet pipe 32. That is, refrigerant can flow from the second condenser 22 to the liquid inlet pipe 32 through the second one-way valve 6b, but refrigerant cannot flow from the liquid inlet pipe 32 to the second condenser 22 through the second one-way valve 6b, thereby preventing the refrigerant in the liquid inlet pipe 32 from flowing to the second condenser 22, which is beneficial to improving the working stability of the air conditioning system 100.

[0138] In some embodiments of the present invention, such as Figure 1As shown, the air conditioning system 100 may further include a sixth-position shut-off valve 2f and a seventh-position shut-off valve 2g. The inlet of the sixth-position shut-off valve 2f is connected to the compressor outlet 1a, and the outlet of the sixth-position shut-off valve 2f is connected to the condenser inlet of the first condenser 21, thereby achieving the effect of selectively connecting the compressor 1 to the first condenser 21. The inlet of the seventh-position shut-off valve 2g is connected to the compressor outlet 1a, and the outlet of the seventh-position shut-off valve 2g is connected to the condenser inlet of the second condenser 22, thereby achieving the effect of selectively connecting the compressor 1 to the second condenser 22.

[0139] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 may further include a heater 12, which can be used to heat the refrigerant flowing through the second condenser 22, thereby increasing the temperature of the refrigerant flowing through the second condenser 22 and thus improving the heating effect of the air conditioning system 100.

[0140] In some embodiments of the present invention, such as Figure 1 As shown, when the air conditioning system 100 is in the passenger cabin cooling mode, the first on / off valve 2a, the second on / off valve 2b, the fourth on / off valve 2d, the fifth on / off valve 2e, and the seventh on / off valve 2g are in the closed state, the first throttle valve 3a, the first expansion valve 3b, and the second expansion valve 3c are in the closed state, and the sixth on / off valve 2f and the third expansion valve 3d are in the open state. In the three-way valve 9, the first interface end is connected to the second interface end.

[0141] Therefore, during the operation of the air conditioning system 100 in the occupant cabin cooling mode, the refrigerant, under the action of the compressor 1, flows sequentially along the sixth shut-off valve 2f, the first condenser 21, the first one-way valve 6a, the liquid storage device 3, the three-way valve 9, the third expansion valve 3d, the evaporator outlet 4b, and the gas-liquid separator 5. Finally, the refrigerant flows from the gas-liquid separator 5 into the compressor 1, so as to achieve the effect of circulating the refrigerant along the various components and pipelines in the air conditioning system 100.

[0142] During the refrigerant flow process, the high-temperature and high-pressure gaseous refrigerant is transformed into a medium-temperature and high-pressure liquid refrigerant after heat exchange in the first condenser 21. The medium-temperature and high-pressure liquid refrigerant is then transformed into a low-temperature and low-pressure liquid refrigerant after throttling and depressurization treatment by the third expansion valve 3d. The low-temperature and low-pressure liquid refrigerant is then transformed into a low-temperature and low-pressure gaseous refrigerant after heat exchange at the evaporator outlet 4b. During the heat exchange process of the refrigerant at the evaporator outlet 4b, the refrigerant absorbs heat from the air in the passenger compartment, thereby achieving the effect of reducing the temperature of the passenger compartment and thus enabling the air conditioning system 100 to have a passenger compartment cooling mode.

[0143] It should be noted that when the air conditioning system 100 is in the passenger compartment cooling mode, by setting the first throttle valve 3a to the closed state, it is beneficial to prevent refrigerant from flowing into the battery pack 10 through the first throttle valve 3a, which is beneficial to improving the pressure stability within the air conditioning system 100, and thus beneficial to improving the working stability of the air conditioning system 100.

[0144] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 can have a battery cooling mode. When the air conditioning system 100 is in battery cooling mode, the first on-off valve 2a, the second on-off valve 2b, the fourth on-off valve 2d, and the seventh on-off valve 2g are in the closed state, the second expansion valve 3c and the third expansion valve 3d are in the closed state, the third on-off valve 2c, the fifth on-off valve 2e, and the sixth on-off valve 2f are in the open state, the first throttle valve 3a and the first expansion valve 3b are in the open state, and in the three-way valve 9, the first port 9a and the second port 9b are connected.

[0145] Therefore, during the operation of the air conditioning system 100 in battery cooling mode, the refrigerant, under the action of the compressor 1, flows sequentially along the sixth shut-off valve 2f, the first condenser 21, the first one-way valve 6a, the liquid storage device 3, the three-way valve 9, the fifth shut-off valve 2e, the first expansion valve 3b, the battery pack 10, the first throttle valve 3a, the third expansion valve 3d, and the gas-liquid separator 5. Finally, the refrigerant flows from the gas-liquid separator 5 into the compressor 1, thereby achieving the effect of circulating the refrigerant along the various components and pipelines in the air conditioning system 100.

[0146] During the refrigerant flow process, the high-temperature and high-pressure gaseous refrigerant is transformed into a medium-temperature and high-pressure liquid refrigerant after heat exchange in the first condenser 21. The medium-temperature and high-pressure liquid refrigerant is then transformed into a low-temperature and low-pressure liquid refrigerant after throttling and depressurization treatment by the first expansion valve 3b. The low-temperature and low-pressure liquid refrigerant is then transformed into a low-temperature and low-pressure gaseous refrigerant after heat exchange in the battery pack 10. During the heat exchange process of the refrigerant through the battery pack 10, the refrigerant absorbs heat from the battery pack 10, thereby achieving the effect of reducing the temperature of the battery pack 10, and thus enabling the air conditioning system 100 to have a battery cooling mode.

[0147] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 can have a passenger compartment plus battery cooling mode. When the air conditioning system 100 is in the passenger compartment plus battery cooling mode, the first on-off valve 2a, the second on-off valve 2b, the fourth on-off valve 2d and the seventh on-off valve 2g are in the closed state, and the second expansion valve 3c is in the closed state. The third on-off valve 2c, the fifth on-off valve 2e and the sixth on-off valve 2f are in the open state, and the first throttle valve 3a, the first expansion valve 3b and the third expansion valve 3d are in the open state. In the three-way valve 9, the first port 9a and the second port 9b are connected.

[0148] Therefore, during the operation of the air conditioning system 100 in battery-cooled mode for the passenger compartment, the refrigerant, under the action of the compressor 1, flows sequentially along the sixth shut-off valve 2f, the first condenser 21, the first one-way valve 6a, the liquid storage device 3, and the three-way valve 9. Since the second port 9b of the three-way valve 9 is connected to the fifth shut-off valve 2e and the third expansion valve 3d, the refrigerant can flow into the battery pack 10 and the evaporator outlet 4b respectively after being discharged from the three-way valve 9. After flowing through the battery pack 10 and the evaporator outlet 4b, the refrigerant flows into the gas-liquid separator 5, so that the refrigerant returns to the compressor 1 after passing through the gas-liquid separator 5, thereby achieving the effect of circulating the refrigerant along the various components and pipelines in the air conditioning system 100.

[0149] In the process of refrigerant flowing from the three-way valve 9 through the battery pack 10 to the gas-liquid separator 5, the refrigerant flows sequentially along the fifth shut-off valve 2e, the first expansion valve 3b, the battery pack 10, the first throttle valve 3a, and the third shut-off valve 2c. During its flow through the battery pack 10, the refrigerant absorbs heat from the battery pack 10, thus lowering its temperature. Similarly, as the refrigerant flows from the three-way valve 9 through the evaporator outlet 4b to the gas-liquid separator 5, it flows sequentially along the third expansion valve 3d and the evaporator outlet 4b. During its flow through the evaporator outlet 4b, the refrigerant absorbs heat from the air in the passenger compartment, further lowering its temperature. Therefore, the air conditioning system 100 achieves the effect of a passenger compartment plus battery cooling mode.

[0150] In some embodiments of the present invention, such as Figure 1 As shown, the passenger cabin plus battery cooling mode can be switched between one of the passenger cabin cooling mode and battery cooling mode. It can also be understood as switching from passenger cabin plus battery cooling mode to passenger cabin cooling mode or battery cooling mode, or switching from passenger cabin cooling mode or battery cooling mode to passenger cabin plus battery cooling mode.

[0151] During the process of switching from the passenger compartment plus battery cooling mode to the passenger compartment cooling mode, the fifth shut-off valve 2e and the first expansion valve 3b are closed to prevent refrigerant from flowing into the battery pack 10. At this time, the first throttle valve 3a and the third shut-off valve 2c are open so that the refrigerant in the battery pack 10 can flow into the gas-liquid separation device 5 under the action of pressure difference, which helps to improve the working stability of the passenger compartment cooling mode.

[0152] During the process of switching from the passenger compartment to the battery cooling mode, the third expansion valve 3d is closed to prevent refrigerant from flowing into the evaporator outlet 4b. Under the action of pressure difference, the refrigerant located in the evaporator outlet 4b can flow into the gas-liquid separation device 5, which helps to improve the working stability of the battery cooling mode.

[0153] It should be noted that when switching from the passenger compartment plus battery cooling mode to the passenger compartment cooling mode or the battery cooling mode, the refrigerant demand in the various components and pipes of the air conditioning system 100 decreases. Therefore, during the switching process, by controlling the liquid storage device 3 to store refrigerant, excessive refrigerant in the various components and pipes of the air conditioning system 100 is avoided, preventing excessively high pressure in the air conditioning system 100. This improves the refrigerant circulation efficiency in the air conditioning system 100, increasing the cooling efficiency during refrigerant flow and thus enhancing the cooling effect of the air conditioning system 100 while reducing its energy consumption. Because the energy consumption of the air conditioning system 100 is reduced, the energy consumption of vehicles using the air conditioning system 100 of this embodiment is lower, which in turn helps to increase the vehicle's driving range.

[0154] In some embodiments, during the process of switching the air conditioning system 100 from passenger compartment plus battery cooling mode to passenger compartment cooling mode, or during the process of switching the air conditioning system 100 from passenger compartment plus battery cooling mode to battery cooling mode, the liquid inlet pipe 32 is first connected to the liquid storage space 31, so that excess refrigerant in the various components and pipes of the air conditioning system 100 flows into the liquid storage space 31, achieving the effect of storing refrigerant in the liquid storage space 31. After the refrigerant in the various components and pipes of the air conditioning system 100 is in a stable state, the liquid inlet pipe 32 and the liquid outlet pipe 33 are connected. The refrigerant is connected so that it flows directly from the inlet pipe 32 to the outlet pipe 33. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. However, the liquid storage device 3 does not dry or filter the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the flow of the refrigerant, and thus improves the operating efficiency of the air conditioning system 100. It also helps to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0155] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 has a fifth operating mode. In the fifth operating mode, the liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the liquid storage space 31. The compressor outlet 1a is connected to the condenser inlet of the first condenser 21. The condenser outlet of the first condenser 21 is connected to the liquid inlet pipe 32. The liquid outlet pipe 33 is connected to the evaporator inlet 4a. The gas-liquid separator inlet 5a is connected to the battery pack 10. The liquid inlet pipe 32 and the liquid outlet pipe 33 are connected.

[0156] The compressor 1 draws out the refrigerant from the battery pack 10 and allows the refrigerant to flow into the compressor 1 through the compressor inlet 1b. The refrigerant flowing out of the evaporator 4 flows into the compressor 1 through the gas-liquid separator 5. The refrigerant compressed by the compressor 1 flows into the first condenser 21 from the compressor outlet 1a for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser 21 flows into the liquid storage space 31 for storage. A portion of the refrigerant in the liquid storage space 31 flows into the evaporator 4 through the liquid outlet pipe 33 to exchange heat with the air in the passenger compartment. When the pressure inside the air conditioning system 100 is stable, the liquid inlet pipe 32 and the liquid outlet pipe 33 are switched to a connected state so that the refrigerant flowing into the liquid storage device 3 can directly flow into the evaporator 4 through the liquid outlet pipe 33 for heat exchange.

[0157] Specifically, in the fifth operating mode, the seventh shut-off valve 2g, the second expansion valve 3c, the fourth shut-off valve 2d, the fifth shut-off valve 2e, the first expansion valve 3b, the first shut-off valve 2a, and the second shut-off valve 2b are in the closed state. This ensures that the refrigerant discharged from the compressor inlet 1b can flow into the evaporator 4 for heat exchange while preventing the refrigerant from flowing into the battery pack 10 for heat exchange. This achieves the effect of the air conditioning system 100 switching from the passenger compartment plus battery cooling mode to the passenger compartment cooling mode.

[0158] Meanwhile, the refrigerant originally located in the battery pack 10 flows from the battery pack 10 to the gas-liquid separator inlet 5a under the action of the compressor, and then flows into the gas-liquid separator 5 through the gas-liquid separator inlet 5a. Then it flows into the compressor 1 through the gas-liquid separator 5. Under the action of the compressor, the refrigerant flows into the first condenser 21, so that the refrigerant flows into the liquid inlet pipe 32 through the first condenser 21. Since the liquid inlet pipe 32 is connected to the liquid storage space 31 at this time, the refrigerant can flow into the liquid storage space 31 through the liquid inlet pipe 32, thereby achieving the effect of storing refrigerant when the air conditioning system 100 switches from the passenger compartment plus battery cooling mode to the passenger compartment cooling mode.

[0159] Furthermore, at this time, the liquid outlet pipe 33 is connected to the liquid storage space 31 so that the refrigerant in the liquid storage space 31 can be discharged from the liquid storage device 3 through the liquid outlet pipe 33. The liquid outlet pipe 33 is connected to the three-way valve 9 so that the refrigerant flows through the three-way valve 9 in sequence through the third expansion valve 3d, the evaporator 4 and the gas-liquid separation device 5, and then flows into the compressor 1 through the gas-liquid separation device 5, thereby achieving the effect of refrigerant circulation and ensuring that the refrigerant circulates through the evaporator 4, thereby achieving the effect of the occupant cabin cooling mode. In addition, when the pressure inside the air conditioning system 100 is stable, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. The refrigerant flowing into the liquid storage device 3 flows directly into the evaporator 4 for heat exchange through the outlet pipe 33. The liquid storage device 3 does not dry or filter the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the refrigerant flow process, and thus improves the operating efficiency of the air conditioning system 100. It also helps to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0160] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system has a sixth operating mode. In the sixth operating mode, the liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the liquid storage space 31, the compressor outlet 1a is connected to the condenser inlet of the first condenser 21, the condenser outlet of the first condenser 21 is connected to the liquid inlet pipe 32, the liquid outlet pipe 33 is connected to the battery pack 10, the gas-liquid separator inlet 5a is connected to the battery pack 10, and the first on / off valve 2a is closed.

[0161] The compressor 1 draws out the refrigerant from the evaporator 4 and allows the refrigerant to flow into the compressor 1 through the compressor inlet 1b. The refrigerant flowing out of the battery pack 10 flows into the compressor 1 through the gas-liquid separator 5. The refrigerant compressed by the compressor 1 flows into the first condenser 21 from the compressor outlet 1a for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser 21 flows into the liquid storage space 31 for storage. A portion of the refrigerant in the liquid storage space 31 flows into the battery pack 10 through the liquid outlet pipe 33 and exchanges heat with the battery pack 10. When the pressure in the air conditioning system 100 is stable, the liquid inlet pipe 32 and the liquid outlet pipe 33 are switched to a connected state so that the refrigerant flowing into the liquid storage device 3 can directly flow into the battery pack 10 through the liquid outlet pipe 33 for heat exchange.

[0162] Specifically, in the sixth operating mode, the seventh shut-off valve 2g, the second expansion valve 3c, the fourth shut-off valve 2d, the first shut-off valve 2a, the third expansion valve 3d, and the second shut-off valve 2b are all closed. This ensures that the refrigerant discharged from the compressor inlet 1b can flow into the battery pack 10 for heat exchange while preventing the refrigerant from flowing into the evaporator 4 for heat exchange. This achieves the effect of switching the air conditioning system 100 from the passenger compartment plus battery cooling mode to the battery cooling mode.

[0163] Meanwhile, the refrigerant originally located in the evaporator 4 flows from the evaporator 4 to the gas-liquid separator inlet 5a under the action of the compressor, and then flows into the gas-liquid separator 5 through the gas-liquid separator inlet 5a. Then it flows into the compressor 1 through the gas-liquid separator 5. Under the action of the compressor, the refrigerant flows into the first condenser 21, so that the refrigerant flows into the liquid inlet pipe 32 through the first condenser 21. Since the liquid inlet pipe 32 is connected to the liquid storage space 31 at this time, the refrigerant can flow into the liquid storage space 31 through the liquid inlet pipe 32, thereby achieving the effect of storing refrigerant when the air conditioning system 100 switches from the passenger compartment plus battery cooling mode to the battery cooling mode.

[0164] Furthermore, at this time, the liquid outlet pipe 33 is connected to the liquid storage space 31, so that the refrigerant in the liquid storage space 31 can be discharged from the liquid storage device 3 through the liquid outlet pipe 33. The liquid outlet pipe 33 is connected to the three-way valve 9, so that the refrigerant flows through the three-way valve 9 in sequence through the fifth shut-off valve 2e, the first expansion valve 3b, the battery pack 10, the first throttle valve 3a, the third shut-off valve 2c and the gas-liquid separation device 5, and then flows into the compressor 1 through the gas-liquid separation device 5, thereby achieving the effect of refrigerant circulation, thus ensuring that the refrigerant circulates through the battery pack 10, and thus achieving the effect of battery cooling mode.

[0165] In addition, when the pressure inside the air conditioning system 100 is stable, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. The refrigerant flowing into the liquid storage device 3 flows directly into the battery pack 10 for heat exchange through the outlet pipe 33. The liquid storage device 3 does not dry or filter the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the refrigerant flow process, thereby improving the operating efficiency of the air conditioning system 100, and also helps to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0166] In some embodiments of the present invention, such as Figure 1As shown, the air conditioning system 100 has a seventh operating mode. In the seventh operating mode, the liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the liquid storage space 31, the compressor outlet 1a is connected to the condenser inlet of the first condenser 21, the condenser outlet of the first condenser 21 is connected to the liquid inlet pipe 32, the liquid outlet pipe 33 is connected to the battery pack 10 and the evaporator 4, the gas-liquid separation device inlet 5a is connected to the battery pack 10, and the first on / off valve 2a is closed.

[0167] The refrigerant flowing out of the compressor 1 flows into the first condenser 21 for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser 21 flows into the liquid storage space 31 to heat the refrigerant in the liquid storage space 31. The heated refrigerant in the liquid storage space 31 flows into the battery pack 10 and the evaporator 4 respectively through the liquid outlet pipe 33. The refrigerant flowing out of the battery pack 10 and the refrigerant flowing out of the evaporator 4 both flow into the gas-liquid separator 5. The refrigerant flowing out of the gas-liquid separator 5 flows into the compressor 1 to participate in the next cycle. After the refrigerant has been circulated multiple times, the liquid inlet pipe 32 and the liquid outlet pipe 33 are switched to a connected state so that the refrigerant flowing into the liquid storage device 31 can directly flow into the battery pack 10 and the evaporator 4 respectively through the liquid outlet pipe 32.

[0168] Specifically, in the seventh operating mode, the seventh on / off valve 2g, the second expansion valve 3c, the fourth on / off valve 2d, the first on / off valve 2a, and the second on / off valve 2b are in the closed state, so that the compressor inlet 1b is suitable for connecting with the evaporator 4 and the battery pack 10, thereby realizing the effect of the air conditioning system 100 switching from the passenger compartment cooling mode to the passenger compartment plus battery cooling mode, or realizing the effect of the air conditioning system 100 switching from the battery cooling mode to the passenger compartment plus battery cooling mode.

[0169] At this time, the refrigerant discharged from the compressor outlet 1a flows sequentially through the sixth shut-off valve 2f, the first condenser 21, the first one-way valve 6a, and the liquid inlet pipe 32. Since the liquid inlet pipe 32 is connected to the liquid storage space 31, the refrigerant discharged from the first condenser 21 flows into the liquid storage space 31. Because the temperature of the refrigerant discharged from the first condenser 21 is higher than that of the refrigerant originally stored in the liquid storage space 31, the refrigerant discharged from the first condenser 21 can heat the refrigerant originally stored in the liquid storage space 31 during the process of the refrigerant flowing into the liquid storage space 31. The refrigerant evaporates due to the heat, thereby increasing the pressure in the liquid storage space 31. Under the action of pressure, the speed at which the refrigerant stored in the liquid storage space 31 flows back to the various components and pipes of the air conditioning system 100 is increased, the refrigerant density in the various components and pipes of the air conditioning system 100 is increased, thereby improving the circulation efficiency of the refrigerant and improving the cooling effect of the air conditioning system 100.

[0170] This allows the refrigerant discharged from the liquid outlet pipe 33 into the liquid storage space 31 to quickly flow into the evaporator 4 and the battery pack 10, respectively. This allows the refrigerant to exchange heat through the evaporator 4 and the battery pack 10, so that during the process of the air conditioning system 100 switching from the passenger compartment cooling mode to the passenger compartment plus battery cooling mode, or during the process of the air conditioning system 100 switching from the battery cooling mode to the passenger compartment plus battery cooling mode, the refrigerant stored in the liquid storage space 31 is replenished to the air conditioning system 100, thereby increasing the refrigerant density flowing through the evaporator 4 and the battery pack 10, and thus improving the cooling effect of the passenger compartment and the battery.

[0171] After the refrigerant flows through the evaporator 4 and the battery pack 10 respectively, the refrigerant flowing through the evaporator 4 flows back to the compressor 1 through the gas-liquid separation device 5 so that the refrigerant can enter the next cycle. The refrigerant flowing through the evaporator 4 flows through the first throttle valve 3a, the third on / off valve 2c and the gas-liquid separation device 5 in sequence, and then flows into the compressor 1, so as to achieve the effect of the refrigerant entering the next cycle.

[0172] In addition, when the pressure inside the air conditioning system 100 is stable, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. The refrigerant flowing into the liquid storage device 3 flows directly into the evaporator 4 and the battery pack 10 for heat exchange through the outlet pipe 33. The liquid storage device 3 does not dry or filter the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the refrigerant flow process, and thus improves the operating efficiency of the air conditioning system 100. It also helps to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0173] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 can have a passenger compartment heating mode. When the air conditioning system 100 is in passenger compartment heating mode, the second shut-off valve 2b, the third shut-off valve 2c, the fourth shut-off valve 2d, the fifth shut-off valve 2e, and the sixth shut-off valve 2f are in the closed state, the first throttle valve 3a, the first expansion valve 3b, and the third expansion valve 3d are in the closed state, the first shut-off valve 2a and the seventh shut-off valve 2g are in the open state, and the second expansion valve 3c is in the open state. In the three-way valve 9, the first port 9a and the third port 9c are connected.

[0174] Therefore, during the operation of the air conditioning system 100 in the passenger compartment heating mode, the refrigerant, under the action of the compressor 1, flows sequentially along the seventh shut-off valve 2g, the second condenser 22, the second one-way valve 6b, the liquid storage device 3, the second expansion valve 3c, the heat exchanger 8, the first shut-off valve 2a, and the gas-liquid separator 5. Finally, the refrigerant flows from the gas-liquid separator 5 into the compressor 1, so as to achieve the effect of refrigerant circulating along the various components and pipelines in the air conditioning system 100.

[0175] During the refrigerant flow, the high-temperature, high-pressure gaseous refrigerant exchanges heat through the second condenser 22 to form a medium-temperature, high-pressure liquid refrigerant. During this heat exchange, the refrigerant releases heat to the air in the passenger compartment, raising the compartment temperature. The medium-temperature, high-pressure liquid refrigerant then undergoes throttling and pressure reduction through the second expansion valve 3c to become a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then exchanges heat through the heat exchanger 8 to form a low-temperature, low-pressure gaseous refrigerant. This achieves the passenger compartment heating mode effect of the air conditioning system 100. It should be noted that during the refrigerant flow through the heat exchanger 8, the refrigerant temperature is lower than the temperature of the heat exchange path 11, allowing the refrigerant to absorb heat from the heat exchange path 11, thus achieving the effect of the low-temperature, low-pressure liquid refrigerant forming a low-temperature, low-pressure gaseous refrigerant after heat exchange through the heat exchanger 8.

[0176] In addition, since the crew cabin heating mode is generally used when the ambient temperature is low (such as in winter), the heat exchange flow path 11 is absorbed by the refrigerant, which helps to reduce the temperature of the heat exchange flow path 11 so that the temperature of the heat exchange flow path 11 can be a suitable operating temperature, thereby achieving the effect of the heat exchange flow path 11 being in a high-efficiency operating range.

[0177] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 can have a battery heating mode. When the air conditioning system 100 is in battery heating mode and is being started for the first time, the third on-off valve 2c, the fourth on-off valve 2d, and the seventh on-off valve 2g are closed, the first on-off valve 2a, the second on-off valve 2b, the fifth on-off valve 2e, and the sixth on-off valve 2f are open, the first throttle valve 3a, the first expansion valve 3b, and the third expansion valve 3d are open, and in the three-way valve 9, the first port 9a and the third port 9c are connected.

[0178] Therefore, during the initial operation of the air conditioning system 100 in battery heating mode, a first heating flow path and a second heating flow path are formed in the air conditioning system 100. The first heating flow path is as follows: the refrigerant flows sequentially along the compressor 1, the sixth shut-off valve 2f, the first condenser 21, the first one-way valve 6a, the liquid storage device 3, the three-way valve 9, the second expansion valve 3c, the heat exchanger 8, the first shut-off valve 2a, and the gas-liquid separator 5, and the refrigerant returns to the compressor 1 through the gas-liquid separator 5.

[0179] During the above-mentioned working process (i.e., the first heating flow path), in the liquid storage device 3, the liquid inlet pipe 32 is connected to the first space 311 and the liquid outlet pipe 33 is connected to the second space 312, while the liquid inlet pipe 32 and the liquid outlet pipe 33 are not connected, so that the refrigerant flows from the liquid inlet pipe 32 into the first space 311. During the process of flowing from the first space 311 into the second space 312, the filter component 34 provided in the liquid storage space 31 can filter and dry the refrigerant, thereby achieving the effect of purifying the refrigerant and improving the working stability of the air conditioning system 100.

[0180] Furthermore, since the temperature of the refrigerant discharged from the first condenser 21 is higher than that of the refrigerant originally stored in the second space 312, the refrigerant discharged from the first condenser 21 can heat the refrigerant originally stored in the second space 312 during the process of the refrigerant flowing into the second space 312. When heated, the density of the refrigerant increases, thereby increasing the pressure in the second space 312. Under the action of pressure, the speed at which the refrigerant stored in the second space 312 flows back to the various components and pipes of the air conditioning system 100 is increased, thereby increasing the density of the refrigerant in the various components and pipes of the air conditioning system 100, thereby improving the circulation efficiency of the refrigerant and improving the heating effect of the air conditioning system 100.

[0181] The second heating flow path is as follows: the refrigerant flows sequentially along the compressor 1, the second on / off valve 2b, the first throttle valve 3a, the battery pack 10, the first expansion valve 3b, the fourth on / off valve 2d, the heat exchanger 8, the first on / off valve 2a and the gas-liquid separator 5, and the refrigerant returns to the compressor 1 through the gas-liquid separator 5.

[0182] During the flow of the refrigerant along the second heating flow path, the high-temperature and high-pressure gaseous refrigerant is transformed into a high-temperature and high-pressure liquid refrigerant after heat exchange with the battery pack 10. During the heat exchange process of the refrigerant through the battery pack 10, the refrigerant releases heat to the battery pack 10, thereby raising the temperature of the battery pack 10. The high-temperature and high-pressure liquid refrigerant is then throttled and depressurized by the first expansion valve 3b to form a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is then transformed into a low-temperature and low-pressure gaseous refrigerant after heat exchange with the heat exchanger 8. Thus, the air conditioning system 100 achieves the effect of having a battery heating mode.

[0183] It should be noted that after the air conditioning system 100 has been running for a period of time and its operating status has stabilized, the first heating flow path can be cut off so that the refrigerant flows only along the second heating flow path. The heat of the refrigerant is used to raise the temperature of the battery pack 10, thereby achieving the effect of the air conditioning system 100 having a battery heating mode.

[0184] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 can have a passenger compartment plus battery heating mode. When the air conditioning system 100 is in the passenger compartment plus battery heating mode, the third on-off valve 2c and the sixth on-off valve 2f are in the closed state, and the third expansion valve 3d is in the closed state. The first on-off valve 2a, the second on-off valve 2b, the fourth on-off valve 2d, the fifth on-off valve 2e and the seventh on-off valve 2g are in the open state. The first throttle valve 3a, the first expansion valve 3b and the second expansion valve 3c are in the open state. In the three-way valve 9, the first interface end is connected to the third interface end.

[0185] Therefore, during the operation of the air conditioning system 100 in the battery heating mode for the passenger compartment, since the compressor outlet 1a is connected to both the seventh on / off valve 2g and the second on / off valve 2b, the refrigerant discharged from the compressor 1 can flow into the second condenser 22 and the battery pack 10 respectively. After the refrigerant flows through the second condenser 22 and the battery pack 10, it flows into the gas-liquid separator 5, so that the refrigerant returns to the compressor 1 after passing through the gas-liquid separator 5, thereby achieving the effect of circulating the refrigerant along the various components and pipelines in the air conditioning system 100.

[0186] During the process of the refrigerant flowing through the second condenser 22, the refrigerant releases heat to the air in the passenger compartment, thereby raising the temperature of the passenger compartment. During the process of the refrigerant flowing through the battery pack 10, the refrigerant releases heat to the battery pack 10, thereby raising the temperature of the battery pack 10. Thus, the air conditioning system 100 achieves the effect of passenger compartment plus battery heating mode.

[0187] In some embodiments of the present invention, such as Figure 1 As shown, in the air conditioning system 100 according to an embodiment of the present invention, when the heating demand command of the air conditioning system 100 is stopped, the compressor 1 is delayed in shutting down, so that at least part of the refrigerant distributed in the various components and pipelines of the air conditioning system 100 flows into the liquid storage device 3 under the action of the compressor 1, and the refrigerant is stored in the liquid storage space 31, so that the liquid storage device 3 can be used to store refrigerant.

[0188] When restarting the passenger cabin heating mode, battery heating mode, or passenger cabin plus battery heating mode, for example, turning off the passenger cabin heating mode and then turning it back on, turning off the battery heating mode and then turning it back on, turning off the passenger cabin plus battery heating mode and then turning it back on, or turning off the passenger cabin heating mode and then turning on one of the battery heating mode and passenger cabin plus battery heating mode, turning off the battery heating mode and then turning on one of the passenger cabin heating mode and passenger cabin plus battery heating mode, or turning off the passenger cabin plus battery heating mode and then turning on one of the passenger cabin heating mode and battery heating mode.

[0189] In the liquid storage device 3, the inlet pipe 32 is connected to the first space 311 and the outlet pipe 33 is connected to the second space 312, but the inlet pipe 32 and the outlet pipe 33 are not connected, so that the refrigerant flows from the inlet pipe 32 into the first space 311. During the process of flowing from the first space 311 into the second space 312, the filter component 34 provided in the liquid storage space 31 can filter and dry the refrigerant, thereby achieving the effect of purifying the refrigerant and improving the working stability of the air conditioning system 100.

[0190] Furthermore, since the temperature of the refrigerant discharged from the first condenser 21 is higher than that of the refrigerant originally stored in the second space 312, the refrigerant discharged from the first condenser 21 can heat the refrigerant originally stored in the second space 312 during the process of the refrigerant flowing into the second space 312. When the refrigerant is heated, its density increases, thereby increasing the pressure in the second space 312. Under the action of pressure, the speed at which the refrigerant stored in the second space 312 flows back to the various components and pipes in the air conditioning system 100 is increased, the refrigerant density in the various components and pipes in the air conditioning system 100 is increased, thereby improving the circulation efficiency of the refrigerant and improving the heating effect of the air conditioning system 100.

[0191] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 has a first operating mode. In the first operating mode, the compressor 1 is delayed and shuts down. The inlet pipe 33 is connected to the liquid storage space 31, the outlet pipe 32 is connected to the liquid storage space 31, the gas-liquid separator inlet 5a is connected to the battery pack 10, the compressor 1 draws out the refrigerant from the battery pack 10 and the evaporator 4 and makes the refrigerant flow into the compressor 1 through the compressor inlet 1b. The refrigerant compressed by the compressor 1 flows into the first condenser 21 from the compressor outlet 1a for heat dissipation and liquefaction. The refrigerant flowing out from the first condenser 21 flows into the liquid storage space 31 for storage. When the compressor 1 stops, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state to complete the refrigerant storage after the air conditioning system 100 stops.

[0192] Specifically, when the air conditioning system 100 is in passenger cabin heating mode, battery heating mode, or passenger cabin plus battery heating mode, and in the first operating mode, after the heating demand command of the air conditioning system 100 stops, the compressor 1 is delayed in shutting down, which can also be understood as the compressor 1 continuing to operate for a period of time.

[0193] The sixth shut-off valve 2f, the fourth shut-off valve 2d, the fifth shut-off valve 2e, the first expansion valve 3b, the third expansion valve 3d, and the second shut-off valve 2b are all in the closed state, thereby preventing the refrigerant discharged from the compressor inlet 1b from flowing into the second condenser 22, the battery pack 10, and the evaporator 4 for heat exchange.

[0194] Simultaneously, under the action of the compressor, the refrigerant located in the battery pack 10 and the evaporator 4 flows into the compressor 1 respectively. After being compressed by the compressor 1, it flows through the first condenser 21 and into the liquid storage space 31 for storage. The refrigerant located in the battery pack 10 flows into the gas-liquid separator 5 sequentially through the first throttle valve 3a and the third on-off valve 2c, and then flows into the compressor 1 from the compressor inlet 1b through the gas-liquid separator 5. The refrigerant located in the evaporator 4 flows into the gas-liquid separator 5, and then flows into the compressor 1 from the compressor inlet 1b through the gas-liquid separator 5. After being compressed by the compressor 1, the refrigerant flows through the sixth on-off valve 2f and the first condenser 21 sequentially. Since the liquid inlet pipe 32 and the liquid storage space 31 are connected at this time, the refrigerant discharged from the first condenser 21 flows into the liquid storage space 31 for storage, thereby realizing the effect of the liquid storage device 3 for storing refrigerant.

[0195] The outlet pipe 33 is adapted to communicate with the liquid storage space 31, and the liquid storage space 31 is also connected to the second expansion valve 3c. At this time, the opening of the second expansion valve 3c is at its minimum, so that a small amount of refrigerant can be discharged from the outlet pipe 33 into the liquid storage space 31, and most of the refrigerant is stored in the liquid storage space 31. This allows the air conditioning system 100 to store most of the refrigerant in the air conditioning system 100 in the liquid storage space 31 when the system is off in passenger compartment heating mode, battery heating mode, or passenger compartment plus battery heating mode. In addition, when the compressor 1 is off, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure, so that the refrigerant stored in the liquid storage space 31 is isolated from the air conditioning system 100, achieving the effect of storing the refrigerant in the liquid storage space 31.

[0196] In existing technology, when an air conditioning system is in heating mode, after the system is turned off, the refrigerant migrates due to the pressure difference within the system, distributing it throughout its components and pipes. When the system restarts in heating mode, the low refrigerant circulation efficiency results in a low heating rate, leading to poor heating performance. Therefore, the air conditioning system 100 according to the present invention improves the heating performance of the air conditioning system 100.

[0197] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 has a second operating mode. In the second operating mode, the liquid inlet pipe 33 is connected to the liquid storage space 31, the liquid outlet pipe 33 is connected to the liquid storage space 31, the condenser inlet of the second condenser 22 is connected to the compressor outlet 1a, the condenser outlet of the second condenser 22 is connected to the liquid inlet pipe 32, and the liquid outlet pipe 33 is connected to the first heat exchanger inlet 8a.

[0198] The refrigerant flowing out of the compressor 1 flows into the second condenser 22 to exchange heat with the air in the passenger compartment. The refrigerant flowing out of the second condenser 22 flows into the liquid storage space 31 to heat the refrigerant in the liquid storage space 31. The heated refrigerant in the liquid storage space 31 flows into the heat exchanger 8 through the liquid outlet pipe 33 for heat exchange. The refrigerant flowing out of the heat exchanger 8 flows into the gas-liquid separator 5 and the compressor 1 in sequence through the bypass flow path 6 to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe 32 and the liquid outlet pipe 33 are switched to a connected state, so that the refrigerant flowing into the liquid storage device 3 flows directly into the heat exchanger 8 through the liquid outlet pipe 32 for heat exchange.

[0199] Specifically, the sixth shut-off valve 2f, the fourth shut-off valve 2d, the fifth shut-off valve 2e, the third expansion valve 3d, the first expansion valve 3b, the first throttle valve 3a, the third shut-off valve 2c, and the second shut-off valve 2b are in the closed state. This ensures that the refrigerant discharged from the compressor inlet 1b can flow into the second condenser 22 for heat exchange, while preventing the refrigerant from flowing into the battery pack 10, the evaporator 4, and the first condenser 21 for heat exchange. This achieves the effect of switching the air conditioning system 100 to the passenger compartment heating mode.

[0200] In the second operating mode, the refrigerant discharged from the compressor 1 flows sequentially through the seventh shut-off valve 2g, the second condenser 22, the second one-way valve 6b, and the liquid inlet pipe 32. At this time, the liquid inlet pipe 32 and the liquid storage space 31 are connected, so that the refrigerant flows through the second condenser 22 and then into the liquid storage space 31 through the liquid inlet pipe 32. Since the refrigerant discharged from the second condenser 22 can heat the refrigerant originally stored in the liquid storage space 31, the refrigerant evaporates due to the heat, thereby increasing the pressure in the liquid storage space 31. Under the action of pressure, the refrigerant is discharged from the liquid storage space 31, thus achieving the effect of replenishing refrigerant when the air conditioning system 100 switches to the passenger compartment heating mode.

[0201] The refrigerant discharged from the liquid outlet pipe 33 into the liquid storage space 31 can quickly flow into the heat exchanger 8. The refrigerant flows into the heat exchanger 8 from the inlet 8a of the first heat exchanger and exits from the outlet 8b of the first heat exchanger. After exiting the heat exchanger 8, the refrigerant flows through the bypass flow path 6 and the gas-liquid separation device 5 in sequence. The refrigerant also flows back to the compressor 1 through the gas-liquid separation device 5 so that the refrigerant can enter the next cycle. This achieves the effect of the refrigerant circulating through the second condenser 22 for heat exchange, ensuring the heating effect in the crew cabin heating mode.

[0202] In addition, when the pressure inside the air conditioning system 100 is stable, the inlet pipe 32 and the outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure so that the refrigerant only flows through the liquid storage device 3. The refrigerant flowing into the liquid storage device 3 flows directly into the heat exchanger 8 through the outlet pipe 33 for heat exchange. The liquid storage device 3 does not dry or filter the refrigerant, which helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reduces the resistance loss during the refrigerant flow process, and thus improves the operating efficiency of the air conditioning system 100. It also helps to reduce the exhaust pressure of the compressor 1, thereby reducing the power consumption of the compressor 1 and increasing the vehicle's driving range.

[0203] In some embodiments of the present invention, such as Figure 1 As shown, the air conditioning system 100 has a third operating mode. In the third operating mode, the liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the liquid storage space 31. The compressor outlet 1a is connected to the battery pack 10 and the condenser inlet of the first condenser 21. The condenser outlet of the first condenser 21 is connected to the liquid inlet pipe 32. The liquid outlet pipe 33 is connected to the first heat exchanger inlet 8a. The first heat exchanger inlet 8a is connected to the bypass flow path 6. The first heat exchanger inlet 8a is connected to the battery pack 10.

[0204] Part of the refrigerant flowing out of compressor 1 flows into the first condenser 21 for heat dissipation and liquefaction, while another part of the refrigerant flowing out of compressor 1 flows into battery pack 10 to heat battery pack 10. The refrigerant flowing out of the first condenser 21 flows into the liquid storage space 31 to heat the refrigerant in the liquid storage space 31. The refrigerant heated in the liquid storage space 31 flows into heat exchanger 10 through liquid outlet pipe 33 for heat exchange, and the refrigerant flowing out of battery pack 10 flows into heat exchanger 8 for heat exchange. The refrigerant flowing out of heat exchanger 8 flows into gas-liquid separator 5 and compressor 1 in sequence through bypass flow path 6 to participate in the next cycle. After the refrigerant has circulated multiple times, the connection between compressor outlet 1a and condenser inlet of the first condenser 21 is cut off, and the connection between liquid outlet pipe 33 and inlet 8a of the first heat exchanger is also cut off.

[0205] Specifically, the seventh shut-off valve 2g, the fifth shut-off valve 2e, the third expansion valve 3d, and the third shut-off valve 2c are in the closed state, ensuring that the refrigerant discharged from the compressor inlet 1b flows into the battery pack 10 while preventing the refrigerant from flowing into the second condenser 22 and the evaporator 4, thereby achieving the effect of switching the air conditioning system 100 to battery heating mode.

[0206] In the second operating mode, the refrigerant discharged from the compressor 1 flows to the liquid storage device 3 and the battery pack 10 respectively. During the process of the refrigerant flowing from the compressor 1 to the liquid storage device 3, the refrigerant flows through the sixth shut-off valve 2f, the first condenser 21 and the first one-way valve 6a in sequence, and flows into the liquid storage space 31 through the liquid inlet pipe 32. Since the refrigerant discharged from the first condenser 21 can heat the refrigerant originally stored in the liquid storage space 31, the refrigerant evaporates due to heat, thereby increasing the pressure in the liquid storage space 31. Under the action of pressure, the refrigerant is discharged from the liquid storage space 31, thereby achieving the effect of replenishing refrigerant when the air conditioning system 100 switches to the battery heating mode.

[0207] During the process of refrigerant flowing from compressor 1 to battery pack 10, the refrigerant flows through the second on / off valve 2b, the first throttle valve 3a and battery pack 10 in sequence, so that the refrigerant flows through battery pack 10 for heat exchange and achieves the effect of battery heating mode.

[0208] After passing through the refrigerant storage space 31, the refrigerant flows into the heat exchanger 8 via the three-way valve 9 and the second expansion valve 3c. The refrigerant discharged from the battery pack 10 flows into the heat exchanger 8 via the first expansion valve 3b and the fourth shut-off valve 2d. This allows the refrigerant flowing through the storage device 3 and the battery pack 10 to be collected in the heat exchanger 8. After passing through the heat exchanger 8, the refrigerant flows through the bypass path 6 and the gas-liquid separator 5, and then returns to the compressor 1 via the gas-liquid separator 5. This achieves the effect of refrigerant circulation and ensures the heating effect of the battery heating mode.

[0209] After the refrigerant has circulated multiple times to stabilize the pressure within the air conditioning system 100, the sixth shut-off valve 2f is switched to the closed state, thereby cutting off the connection between the compressor outlet 1a and the condenser inlet of the first condenser 21. This prevents the refrigerant from flowing from the compressor 1 into the liquid storage device 3 and cuts off the connection between the liquid outlet pipe 33 and the inlet 8a of the first heat exchanger, so that the refrigerant discharged from the compressor outlet 1a only flows into the battery pack 10 for heat exchange, which helps to reduce heat loss and improve the heating effect of the battery heating mode.

[0210] In some embodiments of the present invention, such as Figure 1As shown, the air conditioning system 100 has a fourth operating mode. In the fourth operating mode, the liquid inlet pipe 32 and the liquid outlet pipe 33 are both connected to the liquid storage space 31. The compressor outlet 1a is connected to the battery pack 10 and the condenser inlet of the second condenser 22. The condenser outlet of the second condenser 22 is connected to the liquid inlet pipe 32. The first heat exchanger inlet 8a is connected to the bypass flow path 6, the battery pack 10, and the liquid outlet pipe 32.

[0211] Part of the refrigerant flowing out of compressor 1 flows into the second condenser 22 to exchange heat with the air in the passenger compartment, and another part of the refrigerant flowing out of compressor 1 flows into battery pack 10 to heat battery pack 10. The refrigerant flowing out of the second condenser 22 flows into the liquid storage space 31 to heat the refrigerant in the liquid storage space 31. The heated refrigerant in the liquid storage space 31 flows into heat exchanger 8 through liquid outlet pipe 32 for heat exchange, and the refrigerant flowing out of battery pack 10 flows into heat exchanger 8 for heat exchange. The refrigerant flowing out of heat exchanger 8 flows into gas-liquid separator 5 and compressor 1 in sequence through bypass flow path 6 to participate in the next cycle. After the refrigerant has been circulated multiple times, the liquid inlet pipe 32 and liquid outlet pipe 33 are switched to the connected state.

[0212] Specifically, the sixth shut-off valve 2f, the fifth shut-off valve 2e, the third expansion valve 3d, and the third shut-off valve 2c are in the closed state, ensuring that the refrigerant discharged from the compressor inlet 1b flows into the second condenser 22 and the battery pack 10 while preventing the refrigerant from flowing into the first condenser 21 and the evaporator 4, thereby achieving the effect of switching the air conditioning system 100 to the passenger compartment plus battery heating mode.

[0213] In the fourth operating mode, the refrigerant discharged from the compressor 1 flows to the liquid storage device 3 and the battery pack 10 respectively. During the process of the refrigerant flowing from the compressor 1 to the liquid storage device 3, the refrigerant flows through the seventh shut-off valve 2g, the second condenser 22 and the second one-way valve 6b in sequence, and flows into the liquid storage space 31 through the liquid inlet pipe 32. During this process, the refrigerant flows through the second condenser 22 for heat exchange, thereby achieving the effect of heating the crew compartment. Furthermore, since the refrigerant discharged from the second condenser 22 can heat the refrigerant originally stored in the liquid storage space 31, the refrigerant evaporates due to heat, thereby increasing the pressure in the liquid storage space 31. Under the action of pressure, the refrigerant is discharged from the liquid storage space 31, so that the refrigerant can quickly flow to the heat exchanger 8.

[0214] During the process of refrigerant flowing from compressor 1 to battery pack 10, the refrigerant flows through the second on / off valve 2b, the first throttle valve 3a and battery pack 10 in sequence, so that the refrigerant flows through battery pack 10 for heat exchange and achieves the effect of battery heating mode.

[0215] After passing through the refrigerant storage space 31, the refrigerant flows into the heat exchanger 8 via the three-way valve 9 and the second expansion valve 3c. The refrigerant discharged from the battery pack 10 flows into the heat exchanger 8 via the first expansion valve 3b and the fourth shut-off valve 2d. This allows the refrigerant flowing through the storage device 3 and the battery pack 10 to be collected in the heat exchanger 8. After passing through the heat exchanger 8, the refrigerant flows through the bypass path 6 and the gas-liquid separator 5, and then flows back to the compressor 1 via the gas-liquid separator 5. This achieves the effect of refrigerant circulation and ensures the heating effect of the passenger compartment plus battery heating mode.

[0216] In addition, after the refrigerant has undergone multiple cycles to stabilize the pressure within the air conditioning system 100, the inlet pipe 32 and outlet pipe 33 are switched to a connected state. At this time, the liquid storage device 3 can be understood as being constructed as a conductive conduit structure, so that the refrigerant only flows through the liquid storage device 3. The refrigerant flowing into the liquid storage device 3 directly flows into the heat exchanger 8 through the outlet pipe 33 for heat exchange, which is beneficial to improving the heating effect of the passenger compartment plus battery heating mode. Furthermore, since the liquid storage device 3 does not dry or filter the refrigerant, it helps to avoid the flow resistance generated by the refrigerant during the flow of the refrigerant through the liquid storage device 3, reducing the resistance loss during the refrigerant flow process, thereby improving the operating efficiency of the air conditioning system 100, and also helps to reduce the exhaust pressure of the compressor 1, achieving the effect of reducing the power consumption of the compressor 1, which is beneficial to increasing the vehicle's driving range.

[0217] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0218] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air conditioning system, characterized in that, include: The system comprises a compressor, a first condenser, a second condenser, a liquid storage device, an evaporator, a battery pack, a heat exchanger, a gas-liquid separator, and a bypass flow path. The compressor, the first condenser, the liquid storage device, the evaporator, and the gas-liquid separator are connected in series. The second condenser is connected in parallel with the first condenser. The bypass flow path is connected in parallel with the evaporator and is equipped with a first on / off valve. The liquid storage device is used to dry and filter refrigerant. The liquid storage device has a shell, an inlet pipe and an outlet pipe. A liquid storage space is formed inside the shell. The inlet pipe is selectively connected to the liquid storage space or the outlet pipe. The outlet pipe is also selectively connected to the liquid storage space. The outlet pipe is connected to the bypass flow path. The heat exchanger has a first heat exchanger inlet and a first heat exchanger outlet connected in communication. The first heat exchanger inlet is adapted to be selectively connected to the battery pack and also selectively connected to the liquid outlet pipe. The first heat exchanger outlet is connected to the bypass flow path and also selectively connected to the evaporator inlet. The compressor outlet of the compressor is selectively connected to the battery pack, the gas-liquid separation device inlet of the gas-liquid separation device is selectively connected to the battery pack, and the liquid outlet pipe is selectively connected to the battery pack. The condenser inlet of the first condenser and the condenser inlet of the second condenser are selectively connected to the compressor outlet; the liquid inlet pipe is connected to the condenser outlet of the first condenser and the condenser outlet of the second condenser; and the liquid outlet pipe is selectively connected to the evaporator inlet of the evaporator. The three-way valve has a first port, a second port and a third port. The first port is connected to the liquid outlet pipe, the second port is connected to the bypass flow path, and the second port is also selectively connected to the evaporator inlet. The second port is also adapted to selectively connect to the battery pack, and the third port is selectively connected to the first heat exchanger inlet.

2. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a first operating mode. In the first operating mode, the liquid inlet pipe is connected to the liquid storage space, the liquid outlet pipe is connected to the liquid storage space, the inlet of the gas-liquid separator is connected to the battery pack, the compressor draws out the refrigerant from the battery pack and the evaporator and allows the refrigerant to flow into the compressor through the compressor inlet, the refrigerant after being compressed by the compressor flows into the first condenser for heat dissipation and liquefaction, and then flows into the liquid storage space for storage, when the compressor stops, the liquid inlet pipe and the liquid outlet pipe switch to a connected state.

3. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a second operating mode. In the second operating mode, the liquid inlet pipe is connected to the liquid storage space, the liquid outlet pipe is connected to the liquid storage space, the condenser inlet of the second condenser is connected to the compressor outlet, the condenser outlet of the second condenser is connected to the liquid inlet pipe, and the liquid outlet pipe is connected to the inlet of the first heat exchanger. The refrigerant flowing from the compressor flows into the second condenser to exchange heat with the air in the passenger compartment, and then flows into the liquid storage space to heat the refrigerant there. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange, and then flows into the gas-liquid separator and the compressor in sequence through the bypass path to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state, so that the refrigerant flowing into the liquid storage device can flow out directly through the liquid outlet pipe.

4. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a third operating mode. In the third operating mode, the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage space. The compressor outlet is connected to the battery pack and the condenser inlet of the first condenser. The condenser outlet of the first condenser is connected to the liquid inlet pipe. The liquid outlet pipe is connected to the inlet of the first heat exchanger. The inlet of the first heat exchanger is connected to the bypass flow path. The inlet of the first heat exchanger is connected to the battery pack. Part of the refrigerant flowing out of the compressor flows into the first condenser for heat dissipation and liquefaction, while another part of the refrigerant flowing out of the compressor flows into the battery pack to heat the battery pack. The refrigerant flowing out of the first condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange, and the refrigerant flowing out of the battery pack flows into the heat exchanger for heat exchange. The refrigerant flowing out of the heat exchanger flows into the gas-liquid separator and the compressor in sequence through the bypass flow path to participate in the next cycle. After the refrigerant has circulated multiple times, the connection between the compressor outlet and the condenser inlet of the first condenser is cut off, and the connection between the liquid outlet pipe and the inlet of the first heat exchanger is also cut off.

5. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a fourth operating mode. In the fourth operating mode, the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the battery pack and the condenser inlet of the second condenser, the condenser outlet of the second condenser is connected to the liquid inlet pipe, and the first heat exchanger inlet is connected to the bypass flow path, the battery pack, and the liquid outlet pipe. Part of the refrigerant flowing out of the compressor flows into the second condenser to exchange heat with the air in the passenger compartment, and another part of the refrigerant flowing out of the compressor flows into the battery pack to heat the battery pack. The refrigerant flowing out of the second condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the heat exchanger through the liquid outlet pipe for heat exchange, and the refrigerant flowing out of the battery pack flows into the heat exchanger for heat exchange. The refrigerant flowing out of the heat exchanger flows into the gas-liquid separator and the compressor through the bypass flow path to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state.

6. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a fifth operating mode. In the fifth operating mode, the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the liquid inlet pipe, the liquid outlet pipe is connected to the evaporator inlet, and the gas-liquid separator inlet is connected to the battery pack. The compressor draws refrigerant from the battery pack and allows it to flow into the compressor through the compressor inlet. Refrigerant flowing out of the evaporator flows into the compressor through the gas-liquid separator. The refrigerant compressed by the compressor flows into the first condenser from the compressor outlet for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser flows into the liquid storage space for storage. A portion of the refrigerant in the liquid storage space flows into the evaporator through the liquid outlet pipe to exchange heat with the air in the passenger compartment. When the pressure in the air conditioning system is stable, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state so that the refrigerant flowing into the liquid storage device can directly flow into the evaporator through the liquid outlet pipe for heat exchange.

7. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a sixth operating mode. In the sixth operating mode, the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the liquid inlet pipe, the liquid outlet pipe is connected to the battery pack, the gas-liquid separator inlet is connected to the battery pack, and the first on / off valve is closed. The compressor draws refrigerant from the evaporator and allows it to flow into the compressor through the compressor inlet. Refrigerant flowing out of the battery pack flows into the compressor through the gas-liquid separator. The refrigerant compressed by the compressor flows from the compressor outlet into the first condenser for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser flows into the liquid storage space for storage. A portion of the refrigerant in the liquid storage space flows into the battery pack through the liquid outlet pipe and exchanges heat with the battery pack. When the pressure in the air conditioning system is stable, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state so that the refrigerant flowing into the liquid storage device can directly flow into the battery pack through the liquid outlet pipe for heat exchange.

8. The air conditioning system according to claim 1, characterized in that, The air conditioning system has a seventh operating mode. In the seventh operating mode, the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid storage space, the compressor outlet is connected to the condenser inlet of the first condenser, the condenser outlet of the first condenser is connected to the liquid inlet pipe, the liquid outlet pipe is connected to the battery pack and the evaporator, the gas-liquid separation device inlet is connected to the battery pack, and the first on / off valve is closed. The refrigerant flowing from the compressor flows into the first condenser for heat dissipation and liquefaction. The refrigerant flowing out of the first condenser flows into the liquid storage space to heat the refrigerant in the liquid storage space. The heated refrigerant in the liquid storage space flows into the battery pack and the evaporator through the liquid outlet pipe. The refrigerant flowing out of the battery pack and the refrigerant flowing out of the evaporator both flow into the gas-liquid separator. The refrigerant flowing out of the gas-liquid separator flows into the compressor to participate in the next cycle. After the refrigerant has circulated multiple times, the liquid inlet pipe and the liquid outlet pipe are switched to a connected state so that the refrigerant flowing into the liquid storage device can directly flow into the battery pack and the evaporator through the liquid outlet pipe.

9. The air conditioning system according to any one of claims 1-8, characterized in that, Also includes: A first control flow path and a second control flow path, wherein the first control flow path is adapted to be connected between the inlet of the gas-liquid separator and the battery pack, and the first control flow path is provided with a first on / off valve group; and the second control flow path is adapted to be connected between the liquid outlet pipe and the battery pack, and the second control flow path is provided with a second on / off valve group.

10. The air conditioning system according to claim 9, characterized in that, The compressor outlet is selectively connected to the gas-liquid separator inlet or the battery pack via the first on / off valve group.

11. The air conditioning system according to claim 10, characterized in that, Also includes: The second on / off valve, the first on / off valve group has a third on / off valve and a first throttle valve connected in series, the valve inlet of the second on / off valve is connected to the outlet of the compressor, and the valve outlet of the second on / off valve is connected to both the valve inlet of the third on / off valve and the valve outlet of the first throttle valve.

12. The air conditioning system according to claim 9, characterized in that, Also includes: A fourth on / off valve is connected between the inlet of the first heat exchanger and the second control flow path. The fourth on / off valve is used to control the on / off state of the inlet of the first heat exchanger and the battery pack.

13. The air conditioning system according to claim 12, characterized in that, The second on / off valve group has a fifth on / off valve and a first expansion valve connected in series, and the connection point of the fourth on / off valve with the second control flow path is located between the fifth on / off valve and the first expansion valve.

14. The air conditioning system according to claim 13, characterized in that, Also includes: A second expansion valve is connected between the third port and the first heat exchanger inlet, such that the third port is selectively connected to the first heat exchanger inlet.

15. The air conditioning system according to claim 13, characterized in that, Also includes: The third expansion valve has its inlet connected to the second interface, the first heat exchanger outlet, and the second control flow path, and its outlet connected to the evaporator inlet.

16. The air conditioning system according to claim 1, characterized in that, It also includes a heat exchange flow path, wherein the heat exchanger further has a connected second heat exchanger inlet and a second heat exchanger outlet, the heat exchange flow path being connected between the second heat exchanger inlet and the second heat exchanger outlet.

17. A vehicle, characterized in that, Including the air conditioning system according to any one of claims 1-16.

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